1272400316 has 24 divisors (see below), whose sum is σ = 2442563760. Its totient is φ = 575164800.

The previous prime is 1272400291. The next prime is 1272400333. The reversal of 1272400316 is 6130042721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71921 + ... + 87848.

It is an arithmetic number, because the mean of its divisors is an integer number (101773490).

Almost surely, 2^1272400316 is an apocalyptic number.

It is an amenable number.

1272400316 is a deficient number, since it is larger than the sum of its proper divisors (1170163444).

1272400316 is a wasteful number, since it uses less digits than its factorization.

1272400316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159965 (or 159963 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 1272400316 is about 35670.7207104090. The cubic root of 1272400316 is about 1083.6139552527.

The spelling of 1272400316 in words is "one billion, two hundred seventy-two million, four hundred thousand, three hundred sixteen".