1272072164 has 24 divisors (see below), whose sum is σ = 2434651968. Its totient is φ = 576750240.

The previous prime is 1272072119. The next prime is 1272072181. The reversal of 1272072164 is 4612702721.

It is a self number, because there is not a number n which added to its sum of digits gives 1272072164.

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, 18944 + ... + 53879.

It is an arithmetic number, because the mean of its divisors is an integer number (101443832).

Almost surely, 2^1272072164 is an apocalyptic number.

It is an amenable number.

1272072164 is a deficient number, since it is larger than the sum of its proper divisors (1162579804).

1272072164 is a wasteful number, since it uses less digits than its factorization.

1272072164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73235 (or 73233 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 1272072164 is about 35666.1206749487. The cubic root of 1272072164 is about 1083.5207925754.

Adding to 1272072164 its reverse (4612702721), we get a palindrome (5884774885).

The spelling of 1272072164 in words is "one billion, two hundred seventy-two million, seventy-two thousand, one hundred sixty-four".