2523609 has 32 divisors (see below), whose sum is σ = 4233600. Its totient is φ = 1471680.

The previous prime is 2523593. The next prime is 2523641. The reversal of 2523609 is 9063252.

2523609 is a `hidden beast` number, since 2 + 52 + 3 + 609 = 666.

It is not a de Polignac number, because 2523609 - 2⁴ = 2523593 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2523709) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8467 + ... + 8759.

It is an arithmetic number, because the mean of its divisors is an integer number (132300).

2^2523609 is an apocalyptic number.

2523609 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2523609 is a deficient number, since it is larger than the sum of its proper divisors (1709991).

2523609 is a wasteful number, since it uses less digits than its factorization.

2523609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 336 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 2523609 is about 1588.5871080932. The cubic root of 2523609 is about 136.1467742112.

The spelling of 2523609 in words is "two million, five hundred twenty-three thousand, six hundred nine".