1296374256 has 120 divisors (see below), whose sum is σ = 3830112000. Its totient is φ = 408191616.

The previous prime is 1296374249. The next prime is 1296374263. The reversal of 1296374256 is 6524736921.

1296374256 is a `hidden beast` number, since 1 + 2 + 9 + 637 + 4 + 2 + 5 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (1296374249) and next prime (1296374263).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1802665 + ... + 1803383.

It is an arithmetic number, because the mean of its divisors is an integer number (31917600).

Almost surely, 2^1296374256 is an apocalyptic number.

1296374256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1296374256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1915056000).

1296374256 is an abundant number, since it is smaller than the sum of its proper divisors (2533737744).

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

1296374256 is a wasteful number, since it uses less digits than its factorization.

1296374256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411 (or 1402 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 1296374256 is about 36005.1976247875. The cubic root of 1296374256 is about 1090.3772944080.

The spelling of 1296374256 in words is "one billion, two hundred ninety-six million, three hundred seventy-four thousand, two hundred fifty-six".