1052140321 has 4 divisors (see below), whose sum is σ = 1052428612. Its totient is φ = 1051852032.

The previous prime is 1052140301. The next prime is 1052140337. The reversal of 1052140321 is 1230412501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 98010000 + 954130321 = 9900^2 + 30889^2 .

It is a 3-Lehmer number, since φ(1052140321) divides (1052140321-1)³.

It is a cyclic number.

It is not a de Polignac number, because 1052140321 - 2¹³ = 1052132129 is a prime.

It is a super-2 number, since 2×1052140321² = 2213998510147966082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1052140301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138600 + ... + 145993.

It is an arithmetic number, because the mean of its divisors is an integer number (263107153).

Almost surely, 2^1052140321 is an apocalyptic number.

It is an amenable number.

1052140321 is a deficient number, since it is larger than the sum of its proper divisors (288291).

1052140321 is an equidigital number, since it uses as much as digits as its factorization.

1052140321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288290.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1052140321 is about 32436.7125492088. The cubic root of 1052140321 is about 1017.0864958676.

Adding to 1052140321 its reverse (1230412501), we get a palindrome (2282552822).

The spelling of 1052140321 in words is "one billion, fifty-two million, one hundred forty thousand, three hundred twenty-one".