1272903772 has 36 divisors (see below), whose sum is σ = 2674870464. Its totient is φ = 527929920.

The previous prime is 1272903733. The next prime is 1272903791. The reversal of 1272903772 is 2773092721.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 98673 + ... + 110824.

Almost surely, 2^1272903772 is an apocalyptic number.

It is an amenable number.

1272903772 is an abundant number, since it is smaller than the sum of its proper divisors (1401966692).

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

1272903772 is a wasteful number, since it uses less digits than its factorization.

1272903772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209546 (or 209537 counting only the distinct ones).

The product of its (nonzero) digits is 74088, while the sum is 40.

The square root of 1272903772 is about 35677.7770047406. Note that the first 3 decimals coincide. The cubic root of 1272903772 is about 1083.7568557751.

The spelling of 1272903772 in words is "one billion, two hundred seventy-two million, nine hundred three thousand, seven hundred seventy-two".