1272470540 has 48 divisors (see below), whose sum is σ = 2917555200. Its totient is φ = 462329280.

The previous prime is 1272470539. The next prime is 1272470543. The reversal of 1272470540 is 450742721.

It is a junction number, because it is equal to n+sod(n) for n = 1272470497 and 1272470506.

It is not an unprimeable number, because it can be changed into a prime (1272470543) 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, 470111 + ... + 472809.

It is an arithmetic number, because the mean of its divisors is an integer number (60782400).

Almost surely, 2^1272470540 is an apocalyptic number.

1272470540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1272470540 is an abundant number, since it is smaller than the sum of its proper divisors (1645084660).

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

1272470540 is a wasteful number, since it uses less digits than its factorization.

1272470540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4862 (or 4860 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 32.

The square root of 1272470540 is about 35671.7050335416. The cubic root of 1272470540 is about 1083.6338898350.

The spelling of 1272470540 in words is "one billion, two hundred seventy-two million, four hundred seventy thousand, five hundred forty".