1309254772 has 24 divisors (see below), whose sum is σ = 2657595584. Its totient is φ = 552733632.

The previous prime is 1309254769. The next prime is 1309254797. The reversal of 1309254772 is 2774529031.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 347073 + ... + 350824.

Almost surely, 2^1309254772 is an apocalyptic number.

It is an amenable number.

1309254772 is an abundant number, since it is smaller than the sum of its proper divisors (1348340812).

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

1309254772 is a wasteful number, since it uses less digits than its factorization.

1309254772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697975 (or 697973 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 1309254772 is about 36183.6257442507. The cubic root of 1309254772 is about 1093.9766568440.

The spelling of 1309254772 in words is "one billion, three hundred nine million, two hundred fifty-four thousand, seven hundred seventy-two".