1052404391 has 4 divisors (see below), whose sum is σ = 1069656984. Its totient is φ = 1035151800.

The previous prime is 1052404373. The next prime is 1052404459. The reversal of 1052404391 is 1934042501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1934042501 = 9829 ⋅196769.

It is a cyclic number.

It is not a de Polignac number, because 1052404391 - 2²² = 1048210087 is a prime.

It is a super-2 number, since 2×1052404391² = 2215110004392161762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1052404361) 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, 8626205 + ... + 8626326.

It is an arithmetic number, because the mean of its divisors is an integer number (267414246).

Almost surely, 2^1052404391 is an apocalyptic number.

1052404391 is a deficient number, since it is larger than the sum of its proper divisors (17252593).

1052404391 is an equidigital number, since it uses as much as digits as its factorization.

1052404391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17252592.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1052404391 is about 32440.7828358072. The cubic root of 1052404391 is about 1017.1715794377.

Adding to 1052404391 its reverse (1934042501), we get a palindrome (2986446892).

The spelling of 1052404391 in words is "one billion, fifty-two million, four hundred four thousand, three hundred ninety-one".