1272508040 has 16 divisors (see below), whose sum is σ = 2863143180. Its totient is φ = 509003200.

The previous prime is 1272508037. The next prime is 1272508067. The reversal of 1272508040 is 408052721.

It can be written as a sum of positive squares in 2 ways, for example, as 1247926276 + 24581764 = 35326^2 + 4958^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1272507994 and 1272508012.

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, 15906311 + ... + 15906390.

Almost surely, 2^1272508040 is an apocalyptic number.

1272508040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1272508040 is an abundant number, since it is smaller than the sum of its proper divisors (1590635140).

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

1272508040 is a wasteful number, since it uses less digits than its factorization.

1272508040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31812712 (or 31812708 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 1272508040 is about 35672.2306563523. The cubic root of 1272508040 is about 1083.6445347106.

The spelling of 1272508040 in words is "one billion, two hundred seventy-two million, five hundred eight thousand, forty".