1056255232421 has 4 divisors (see below), whose sum is σ = 1056320989152. Its totient is φ = 1056189475692.

The previous prime is 1056255232387. The next prime is 1056255232429. The reversal of 1056255232421 is 1242325526501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1056255232421 is a prime.

It is a super-2 number, since 2×1056255232421² (a number of 25 digits) 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 (1056255232429) 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, 32854265 + ... + 32886398.

It is an arithmetic number, because the mean of its divisors is an integer number (264080247288).

Almost surely, 2^{1056255232421} is an apocalyptic number.

It is an amenable number.

1056255232421 is a deficient number, since it is larger than the sum of its proper divisors (65756731).

1056255232421 is an equidigital number, since it uses as much as digits as its factorization.

1056255232421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65756730.

The product of its (nonzero) digits is 144000, while the sum is 38.

The spelling of 1056255232421 in words is "one trillion, fifty-six billion, two hundred fifty-five million, two hundred thirty-two thousand, four hundred twenty-one".