1272864204 has 18 divisors (see below), whose sum is σ = 3217517940. Its totient is φ = 424288056.

The previous prime is 1272864193. The next prime is 1272864217. The reversal of 1272864204 is 4024682721.

1272864204 is a `hidden beast` number, since 1 + 2 + 7 + 2 + 8 + 642 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 35357339 = 1272864204 / (1 + 2 + 7 + 2 + 8 + 6 + 4 + 2 + 0 + 4).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17678634 + ... + 17678705.

Almost surely, 2^1272864204 is an apocalyptic number.

It is an amenable number.

1272864204 is an abundant number, since it is smaller than the sum of its proper divisors (1944653736).

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

1272864204 is a wasteful number, since it uses less digits than its factorization.

1272864204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35357349 (or 35357344 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 1272864204 is about 35677.2224815778. Note that the first 3 decimals coincide. The cubic root of 1272864204 is about 1083.7456261921.

The spelling of 1272864204 in words is "one billion, two hundred seventy-two million, eight hundred sixty-four thousand, two hundred four".