1296253960 has 16 divisors (see below), whose sum is σ = 2916571500. Its totient is φ = 518501568.

The previous prime is 1296253949. The next prime is 1296253999. The reversal of 1296253960 is 693526921.

It can be written as a sum of positive squares in 2 ways, for example, as 1213407556 + 82846404 = 34834^2 + 9102^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16203135 + ... + 16203214.

Almost surely, 2^1296253960 is an apocalyptic number.

1296253960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1296253960 is an abundant number, since it is smaller than the sum of its proper divisors (1620317540).

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

1296253960 is a wasteful number, since it uses less digits than its factorization.

1296253960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32406360 (or 32406356 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 1296253960 is about 36003.5270494434. The cubic root of 1296253960 is about 1090.3435664718.

The spelling of 1296253960 in words is "one billion, two hundred ninety-six million, two hundred fifty-three thousand, nine hundred sixty".