11665425 has 12 divisors (see below), whose sum is σ = 19286960. Its totient is φ = 6221520.

The previous prime is 11665403. The next prime is 11665429. The reversal of 11665425 is 52456611.

It is not a de Polignac number, because 11665425 - 2¹⁷ = 11534353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11665392 and 11665401.

It is not an unprimeable number, because it can be changed into a prime (11665429) 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, 77695 + ... + 77844.

Almost surely, 2^11665425 is an apocalyptic number.

11665425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11665425 is a deficient number, since it is larger than the sum of its proper divisors (7621535).

11665425 is a wasteful number, since it uses less digits than its factorization.

11665425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155552 (or 155547 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 11665425 is about 3415.4684890949. The cubic root of 11665425 is about 226.7950241374.

It can be divided in two parts, 11665 and 425, that added together give a triangular number (12090 = T₁₅₅).

The spelling of 11665425 in words is "eleven million, six hundred sixty-five thousand, four hundred twenty-five".