1272392432 has 20 divisors (see below), whose sum is σ = 2483259216. Its totient is φ = 631551360.

The previous prime is 1272392423. The next prime is 1272392477. The reversal of 1272392432 is 2342932721.

It is a junction number, because it is equal to n+sod(n) for n = 1272392392 and 1272392401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288044 + ... + 292427.

Almost surely, 2^1272392432 is an apocalyptic number.

It is an amenable number.

1272392432 is a deficient number, since it is larger than the sum of its proper divisors (1210866784).

1272392432 is a wasteful number, since it uses less digits than its factorization.

1272392432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580616 (or 580610 counting only the distinct ones).

The product of its digits is 36288, while the sum is 35.

The square root of 1272392432 is about 35670.6101994345. The cubic root of 1272392432 is about 1083.6117171651.

The spelling of 1272392432 in words is "one billion, two hundred seventy-two million, three hundred ninety-two thousand, four hundred thirty-two".