1052331421 has 4 divisors (see below), whose sum is σ = 1052397244. Its totient is φ = 1052265600.

The previous prime is 1052331407. The next prime is 1052331437. The reversal of 1052331421 is 1241332501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1241332501 = 29 ⋅42804569.

It can be written as a sum of positive squares in 2 ways, for example, as 396408100 + 655923321 = 19910^2 + 25611^2 .

It is a cyclic number.

It is not a de Polignac number, because 1052331421 - 2¹⁷ = 1052200349 is a prime.

It is a super-2 number, since 2×1052331421² = 2214802839247758482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1052331392 and 1052331401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1052331451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8131 + ... + 46591.

It is an arithmetic number, because the mean of its divisors is an integer number (263099311).

Almost surely, 2^1052331421 is an apocalyptic number.

It is an amenable number.

1052331421 is a deficient number, since it is larger than the sum of its proper divisors (65823).

1052331421 is an equidigital number, since it uses as much as digits as its factorization.

1052331421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65822.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1052331421 is about 32439.6581517130. The cubic root of 1052331421 is about 1017.1480698672.

Adding to 1052331421 its reverse (1241332501), we get a palindrome (2293663922).

The spelling of 1052331421 in words is "one billion, fifty-two million, three hundred thirty-one thousand, four hundred twenty-one".