1272405970 has 32 divisors (see below), whose sum is σ = 2645519616. Its totient is φ = 435475200.

The previous prime is 1272405887. The next prime is 1272405973. The reversal of 1272405970 is 795042721.

It is not an unprimeable number, because it can be changed into a prime (1272405973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 338346 + ... + 342085.

It is an arithmetic number, because the mean of its divisors is an integer number (82672488).

Almost surely, 2^1272405970 is an apocalyptic number.

1272405970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1272405970 is an abundant number, since it is smaller than the sum of its proper divisors (1373113646).

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

1272405970 is a wasteful number, since it uses less digits than its factorization.

1272405970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680466.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 1272405970 is about 35670.7999629949. The cubic root of 1272405970 is about 1083.6155602885.

The spelling of 1272405970 in words is "one billion, two hundred seventy-two million, four hundred five thousand, nine hundred seventy".