1056780251 has 4 divisors (see below), whose sum is σ = 1057551312. Its totient is φ = 1056009192.

The previous prime is 1056780239. The next prime is 1056780253. The reversal of 1056780251 is 1520876501.

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

It is a cyclic number.

It is not a de Polignac number, because 1056780251 - 2⁶ = 1056780187 is a prime.

It is a super-2 number, since 2×1056780251² = 2233568997807246002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1056780253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383471 + ... + 386216.

It is an arithmetic number, because the mean of its divisors is an integer number (264387828).

Almost surely, 2^1056780251 is an apocalyptic number.

1056780251 is a deficient number, since it is larger than the sum of its proper divisors (771061).

1056780251 is an equidigital number, since it uses as much as digits as its factorization.

1056780251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771060.

The product of its (nonzero) digits is 16800, while the sum is 35.

The square root of 1056780251 is about 32508.1566841308. The cubic root of 1056780251 is about 1018.5794177309.

The spelling of 1056780251 in words is "one billion, fifty-six million, seven hundred eighty thousand, two hundred fifty-one".