1225760815 has 12 divisors (see below), whose sum is σ = 1480152744. Its totient is φ = 974487024.

The previous prime is 1225760807. The next prime is 1225760819. The reversal of 1225760815 is 5180675221.

It is not a de Polignac number, because 1225760815 - 2³ = 1225760807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225760819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128232 + ... + 137458.

It is an arithmetic number, because the mean of its divisors is an integer number (123346062).

Almost surely, 2^1225760815 is an apocalyptic number.

1225760815 is a deficient number, since it is larger than the sum of its proper divisors (254391929).

1225760815 is an frugal number, since it uses more digits than its factorization.

1225760815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9558 (or 9395 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 1225760815 is about 35010.8670986595. The cubic root of 1225760815 is about 1070.2089483344.

The spelling of 1225760815 in words is "one billion, two hundred twenty-five million, seven hundred sixty thousand, eight hundred fifteen".