2525409 has 12 divisors (see below), whose sum is σ = 3664596. Its totient is φ = 1675872.

The previous prime is 2525389. The next prime is 2525417. The reversal of 2525409 is 9045252.

2525409 is a `hidden beast` number, since 252 + 5 + 409 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 138384 + 2387025 = 372^2 + 1545^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2525409 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2525429) 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, 1987 + ... + 2999.

It is an arithmetic number, because the mean of its divisors is an integer number (305383).

2^2525409 is an apocalyptic number.

It is an amenable number.

2525409 is a deficient number, since it is larger than the sum of its proper divisors (1139187).

2525409 is a wasteful number, since it uses less digits than its factorization.

2525409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296 (or 1293 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 2525409 is about 1589.1535482766. The cubic root of 2525409 is about 136.1791360590.

The spelling of 2525409 in words is "two million, five hundred twenty-five thousand, four hundred nine".