1254991572 has 36 divisors (see below), whose sum is σ = 3339306880. Its totient is φ = 396312912.

The previous prime is 1254991531. The next prime is 1254991607. The reversal of 1254991572 is 2751994521.

1254991572 is a `hidden beast` number, since 1 + 2 + 5 + 499 + 157 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 916708 + ... + 918075.

Almost surely, 2^1254991572 is an apocalyptic number.

1254991572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1254991572 is an abundant number, since it is smaller than the sum of its proper divisors (2084315308).

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

1254991572 is a wasteful number, since it uses less digits than its factorization.

1254991572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1834812 (or 1834807 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The square root of 1254991572 is about 35425.8602153850. The cubic root of 1254991572 is about 1078.6493094197.

The spelling of 1254991572 in words is "one billion, two hundred fifty-four million, nine hundred ninety-one thousand, five hundred seventy-two".