25012645 has 32 divisors (see below), whose sum is σ = 37382400. Its totient is φ = 15676416.

The previous prime is 25012643. The next prime is 25012651. The reversal of 25012645 is 54621052.

25012645 = 137² + 138² + ... + 426².

It is not a de Polignac number, because 25012645 - 2¹ = 25012643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25012643) 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, 18637 + ... + 19933.

It is an arithmetic number, because the mean of its divisors is an integer number (1168200).

Almost surely, 2^25012645 is an apocalyptic number.

It is an amenable number.

25012645 is a deficient number, since it is larger than the sum of its proper divisors (12369755).

25012645 is a wasteful number, since it uses less digits than its factorization.

25012645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 25012645 is about 5001.2643401444. The cubic root of 25012645 is about 292.4510644509.

Adding to 25012645 its reverse (54621052), we get a palindrome (79633697).

The spelling of 25012645 in words is "twenty-five million, twelve thousand, six hundred forty-five".