1250964864 has 128 divisors (see below), whose sum is σ = 3886608000. Its totient is φ = 395020800.

The previous prime is 1250964829. The next prime is 1250964889. The reversal of 1250964864 is 4684690521.

1250964864 is a `hidden beast` number, since 1 + 2 + 509 + 64 + 86 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56139 + ... + 75189.

It is an arithmetic number, because the mean of its divisors is an integer number (30364125).

Almost surely, 2^1250964864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1250964864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1943304000).

1250964864 is an abundant number, since it is smaller than the sum of its proper divisors (2635643136).

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

1250964864 is a wasteful number, since it uses less digits than its factorization.

1250964864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19093 (or 19075 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 1250964864 is about 35368.9816647299. The cubic root of 1250964864 is about 1077.4944385958.

The spelling of 1250964864 in words is "one billion, two hundred fifty million, nine hundred sixty-four thousand, eight hundred sixty-four".