25120645 has 32 divisors (see below), whose sum is σ = 35427456. Its totient is φ = 16896000.

The previous prime is 25120639. The next prime is 25120651. The reversal of 25120645 is 54602152.

25120645 = T₁₃₄ + T₁₃₅ + ... + T₅₃₄.

It is an interprime number because it is at equal distance from previous prime (25120639) and next prime (25120651).

It is not a de Polignac number, because 25120645 - 2²¹ = 23023493 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62445 + ... + 62845.

It is an arithmetic number, because the mean of its divisors is an integer number (1107108).

Almost surely, 2^25120645 is an apocalyptic number.

It is an amenable number.

25120645 is a deficient number, since it is larger than the sum of its proper divisors (10306811).

25120645 is a wasteful number, since it uses less digits than its factorization.

25120645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501.

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

The square root of 25120645 is about 5012.0499797987. The cubic root of 25120645 is about 292.8713767196.

Adding to 25120645 its reverse (54602152), we get a palindrome (79722797).

The spelling of 25120645 in words is "twenty-five million, one hundred twenty thousand, six hundred forty-five".