1249719264 has 36 divisors (see below), whose sum is σ = 3553889976. Its totient is φ = 416572992.

The previous prime is 1249719257. The next prime is 1249719269. The reversal of 1249719264 is 4629179421.

1249719264 is a `hidden beast` number, since 12 + 497 + 1 + 92 + 64 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249719269) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2169364 + ... + 2169939.

It is an arithmetic number, because the mean of its divisors is an integer number (98719166).

Almost surely, 2^1249719264 is an apocalyptic number.

It is an amenable number.

1249719264 is an abundant number, since it is smaller than the sum of its proper divisors (2304170712).

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

1249719264 is a wasteful number, since it uses less digits than its factorization.

1249719264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4339319 (or 4339308 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 1249719264 is about 35351.3686297999. The cubic root of 1249719264 is about 1077.1366953277.

The spelling of 1249719264 in words is "one billion, two hundred forty-nine million, seven hundred nineteen thousand, two hundred sixty-four".