1052561321 has 8 divisors (see below), whose sum is σ = 1241731584. Its totient is φ = 873092160.

The previous prime is 1052561317. The next prime is 1052561327. The reversal of 1052561321 is 1231652501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1052561321 - 2² = 1052561317 is a prime.

It is a super-2 number, since 2×1052561321² = 2215770668930530082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1052561327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2425040 + ... + 2425473.

It is an arithmetic number, because the mean of its divisors is an integer number (155216448).

Almost surely, 2^1052561321 is an apocalyptic number.

It is an amenable number.

1052561321 is a deficient number, since it is larger than the sum of its proper divisors (189170263).

1052561321 is an equidigital number, since it uses as much as digits as its factorization.

1052561321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4850551.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1052561321 is about 32443.2014603984. The cubic root of 1052561321 is about 1017.2221356699. Note that the first 3 decimals are identical.

The spelling of 1052561321 in words is "one billion, fifty-two million, five hundred sixty-one thousand, three hundred twenty-one".