1256261464 has 16 divisors (see below), whose sum is σ = 2356317720. Its totient is φ = 627910080.

The previous prime is 1256261459. The next prime is 1256261477. The reversal of 1256261464 is 4641626521.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1989 + ... + 50164.

Almost surely, 2^1256261464 is an apocalyptic number.

It is an amenable number.

1256261464 is a deficient number, since it is larger than the sum of its proper divisors (1100056256).

1256261464 is a wasteful number, since it uses less digits than its factorization.

1256261464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55170 (or 55166 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 1256261464 is about 35443.7789181684. The cubic root of 1256261464 is about 1079.0130054552.

Adding to 1256261464 its reverse (4641626521), we get a palindrome (5897887985).

The spelling of 1256261464 in words is "one billion, two hundred fifty-six million, two hundred sixty-one thousand, four hundred sixty-four".