25515045 has 24 divisors (see below), whose sum is σ = 46829016. Its totient is φ = 12807168.

The previous prime is 25515029. The next prime is 25515053. The reversal of 25515045 is 54051552.

It can be written as a sum of positive squares in 4 ways, for example, as 1397124 + 24117921 = 1182^2 + 4911^2 .

It is not a de Polignac number, because 25515045 - 2⁴ = 25515029 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15912 + ... + 17441.

It is an arithmetic number, because the mean of its divisors is an integer number (1951209).

Almost surely, 2^25515045 is an apocalyptic number.

It is an amenable number.

25515045 is a deficient number, since it is larger than the sum of its proper divisors (21313971).

25515045 is a wasteful number, since it uses less digits than its factorization.

25515045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33381 (or 33378 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 25515045 is about 5051.2419264969. The cubic root of 25515045 is about 294.3961409892.

Adding to 25515045 its reverse (54051552), we get a palindrome (79566597).

The spelling of 25515045 in words is "twenty-five million, five hundred fifteen thousand, forty-five".