1256464 has 40 divisors (see below), whose sum is σ = 2723040. Its totient is φ = 561440.

The previous prime is 1256449. The next prime is 1256477. The reversal of 1256464 is 4646521.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

Its product of digits (5760) is a multiple of the sum of its prime divisors (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21267 + ... + 21325.

It is an arithmetic number, because the mean of its divisors is an integer number (68076).

2^1256464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1256464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1361520).

1256464 is an abundant number, since it is smaller than the sum of its proper divisors (1466576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1256464 is an equidigital number, since it uses as much as digits as its factorization.

1256464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100 (or 72 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 1256464 is about 1120.9210498514. The cubic root of 1256464 is about 107.9070988935.

The spelling of 1256464 in words is "one million, two hundred fifty-six thousand, four hundred sixty-four".