1052345521 has 4 divisors (see below), whose sum is σ = 1052537332. Its totient is φ = 1052153712.

The previous prime is 1052345501. The next prime is 1052345537. The reversal of 1052345521 is 1255432501.

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 929579121 + 122766400 = 30489^2 + 11080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1052345521 is a prime.

It is a super-2 number, since 2×1052345521² = 2214862191137522882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1052345521.

It is not an unprimeable number, because it can be changed into a prime (1052345501) 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, 87426 + ... + 98731.

It is an arithmetic number, because the mean of its divisors is an integer number (263134333).

Almost surely, 2^1052345521 is an apocalyptic number.

It is an amenable number.

1052345521 is a deficient number, since it is larger than the sum of its proper divisors (191811).

1052345521 is an equidigital number, since it uses as much as digits as its factorization.

1052345521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191810.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 1052345521 is about 32439.8754775662. The cubic root of 1052345521 is about 1017.1526127084.

The spelling of 1052345521 in words is "one billion, fifty-two million, three hundred forty-five thousand, five hundred twenty-one".