1165505425 has 30 divisors (see below), whose sum is σ = 1686084358. Its totient is φ = 799162560.

The previous prime is 1165505413. The next prime is 1165505449. The reversal of 1165505425 is 5245055611.

It can be written as a sum of positive squares in 3 ways, for example, as 15752961 + 1149752464 = 3969^2 + 33908^2 .

It is not a de Polignac number, because 1165505425 - 2⁹ = 1165504913 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 50317 + ... + 69733.

Almost surely, 2^1165505425 is an apocalyptic number.

It is an amenable number.

1165505425 is a deficient number, since it is larger than the sum of its proper divisors (520578933).

1165505425 is an frugal number, since it uses more digits than its factorization.

1165505425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19455 (or 19429 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 34.

The square root of 1165505425 is about 34139.4994837358. The cubic root of 1165505425 is about 1052.3772065206.

The spelling of 1165505425 in words is "one billion, one hundred sixty-five million, five hundred five thousand, four hundred twenty-five".