1249157472 has 48 divisors (see below), whose sum is σ = 3290696640. Its totient is φ = 414905472.

The previous prime is 1249157423. The next prime is 1249157479. The reversal of 1249157472 is 2747519421.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249157479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4179 + ... + 50157.

It is an arithmetic number, because the mean of its divisors is an integer number (68556180).

Almost surely, 2^1249157472 is an apocalyptic number.

1249157472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1249157472 is an abundant number, since it is smaller than the sum of its proper divisors (2041539168).

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

1249157472 is a wasteful number, since it uses less digits than its factorization.

1249157472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46275 (or 46267 counting only the distinct ones).

The product of its digits is 141120, while the sum is 42.

The square root of 1249157472 is about 35343.4219056390. The cubic root of 1249157472 is about 1076.9752677459.

The spelling of 1249157472 in words is "one billion, two hundred forty-nine million, one hundred fifty-seven thousand, four hundred seventy-two".