1025256123 has 14 divisors (see below), whose sum is σ = 1537182084. Its totient is φ = 683503596.

The previous prime is 1025256107. The next prime is 1025256137. The reversal of 1025256123 is 3216525201.

It is a happy number.

1025256123 is a `hidden beast` number, since 1 + 0 + 25 + 25 + 612 + 3 = 666.

It is not a de Polignac number, because 1025256123 - 2⁴ = 1025256107 is a prime.

It is a super-2 number, since 2×1025256123² = 2102300235497982258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1025256223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 702465 + ... + 703922.

Almost surely, 2^1025256123 is an apocalyptic number.

1025256123 is a deficient number, since it is larger than the sum of its proper divisors (511925961).

1025256123 is an frugal number, since it uses more digits than its factorization.

1025256123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406405 (or 1406390 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1025256123 is about 32019.6209065629. The cubic root of 1025256123 is about 1008.3488110428.

The spelling of 1025256123 in words is "one billion, twenty-five million, two hundred fifty-six thousand, one hundred twenty-three".