1256323023 has 6 divisors (see below), whose sum is σ = 1814688824. Its totient is φ = 837548676.

The previous prime is 1256323009. The next prime is 1256323027. The reversal of 1256323023 is 3203236521.

1256323023 is a `hidden beast` number, since 1 + 2 + 5 + 632 + 3 + 0 + 23 = 666.

It is not a de Polignac number, because 1256323023 - 2²¹ = 1254225871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256323027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 69795715 + ... + 69795732.

Almost surely, 2^1256323023 is an apocalyptic number.

1256323023 is a deficient number, since it is larger than the sum of its proper divisors (558365801).

1256323023 is a wasteful number, since it uses less digits than its factorization.

1256323023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139591453 (or 139591450 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 1256323023 is about 35444.6473109834. The cubic root of 1256323023 is about 1079.0306296729.

Adding to 1256323023 its reverse (3203236521), we get a palindrome (4459559544).

The spelling of 1256323023 in words is "one billion, two hundred fifty-six million, three hundred twenty-three thousand, twenty-three".