1249251964 has 24 divisors (see below), whose sum is σ = 2234615040. Its totient is φ = 610939056.

The previous prime is 1249251961. The next prime is 1249251977. The reversal of 1249251964 is 4691529421.

It is a self number, because there is not a number n which added to its sum of digits gives 1249251964.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249251961) 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, 15339 + ... + 52285.

It is an arithmetic number, because the mean of its divisors is an integer number (93108960).

Almost surely, 2^1249251964 is an apocalyptic number.

It is an amenable number.

1249251964 is a deficient number, since it is larger than the sum of its proper divisors (985363076).

1249251964 is a wasteful number, since it uses less digits than its factorization.

1249251964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37137 (or 37135 counting only the distinct ones).

The product of its digits is 155520, while the sum is 43.

The square root of 1249251964 is about 35344.7586496216. The cubic root of 1249251964 is about 1077.0024228440.

The spelling of 1249251964 in words is "one billion, two hundred forty-nine million, two hundred fifty-one thousand, nine hundred sixty-four".