1264013895 has 8 divisors (see below), whose sum is σ = 2022422256. Its totient is φ = 674140736.

The previous prime is 1264013851. The next prime is 1264013897. The reversal of 1264013895 is 5983104621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1264013895 - 2²² = 1259819591 is a prime.

It is a super-2 number, since 2×1264013895² = 3195462253506142050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264013897) 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, 42133782 + ... + 42133811.

It is an arithmetic number, because the mean of its divisors is an integer number (252802782).

Almost surely, 2^1264013895 is an apocalyptic number.

1264013895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1264013895 is a deficient number, since it is larger than the sum of its proper divisors (758408361).

1264013895 is an equidigital number, since it uses as much as digits as its factorization.

1264013895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84267601.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 1264013895 is about 35552.9730824301. The cubic root of 1264013895 is about 1081.2279970575.

The spelling of 1264013895 in words is "one billion, two hundred sixty-four million, thirteen thousand, eight hundred ninety-five".