1264159140 has 24 divisors (see below), whose sum is σ = 3539645760. Its totient is φ = 337109088.

The previous prime is 1264159123. The next prime is 1264159153. The reversal of 1264159140 is 419514621.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10534600 + ... + 10534719.

It is an arithmetic number, because the mean of its divisors is an integer number (147485240).

Almost surely, 2^1264159140 is an apocalyptic number.

1264159140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1264159140 is an abundant number, since it is smaller than the sum of its proper divisors (2275486620).

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

1264159140 is a wasteful number, since it uses less digits than its factorization.

1264159140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21069331 (or 21069329 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 1264159140 is about 35555.0156799290. The cubic root of 1264159140 is about 1081.2694092989.

The spelling of 1264159140 in words is "one billion, two hundred sixty-four million, one hundred fifty-nine thousand, one hundred forty".