1256264435 has 4 divisors (see below), whose sum is σ = 1507517328. Its totient is φ = 1005011544.

The previous prime is 1256264431. The next prime is 1256264437. The reversal of 1256264435 is 5344626521.

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 1256264435 - 2² = 1256264431 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1256264431) 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, 125626439 + ... + 125626448.

It is an arithmetic number, because the mean of its divisors is an integer number (376879332).

Almost surely, 2^1256264435 is an apocalyptic number.

1256264435 is a deficient number, since it is larger than the sum of its proper divisors (251252893).

1256264435 is an equidigital number, since it uses as much as digits as its factorization.

1256264435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251252892.

The product of its digits is 172800, while the sum is 38.

The square root of 1256264435 is about 35443.8208295889. The cubic root of 1256264435 is about 1079.0138560597.

The spelling of 1256264435 in words is "one billion, two hundred fifty-six million, two hundred sixty-four thousand, four hundred thirty-five".