1238813265 has 16 divisors (see below), whose sum is σ = 2015697600. Its totient is φ = 649501632.

The previous prime is 1238813201. The next prime is 1238813269. The reversal of 1238813265 is 5623188321.

It is not a de Polignac number, because 1238813265 - 2⁶ = 1238813201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1238813269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 699010 + ... + 700779.

It is an arithmetic number, because the mean of its divisors is an integer number (125981100).

Almost surely, 2^1238813265 is an apocalyptic number.

1238813265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1238813265 is a deficient number, since it is larger than the sum of its proper divisors (776884335).

1238813265 is a wasteful number, since it uses less digits than its factorization.

1238813265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399856.

The product of its digits is 69120, while the sum is 39.

The square root of 1238813265 is about 35196.7791850334. The cubic root of 1238813265 is about 1073.9942321854.

The spelling of 1238813265 in words is "one billion, two hundred thirty-eight million, eight hundred thirteen thousand, two hundred sixty-five".