25070645 has 16 divisors (see below), whose sum is σ = 31970160. Its totient is φ = 18837504.

The previous prime is 25070611. The next prime is 25070653. The reversal of 25070645 is 54607052.

It can be written as a sum of positive squares in 8 ways, for example, as 4919524 + 20151121 = 2218^2 + 4489^2 .

It is a cyclic number.

It is not a de Polignac number, because 25070645 - 2⁸ = 25070389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3029 + ... + 7701.

It is an arithmetic number, because the mean of its divisors is an integer number (1998135).

Almost surely, 2^25070645 is an apocalyptic number.

It is an amenable number.

25070645 is a deficient number, since it is larger than the sum of its proper divisors (6899515).

25070645 is a wasteful number, since it uses less digits than its factorization.

25070645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4744.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 25070645 is about 5007.0595163229. The cubic root of 25070645 is about 292.6769377752.

Adding to 25070645 its reverse (54607052), we get a palindrome (79677697).

The spelling of 25070645 in words is "twenty-five million, seventy thousand, six hundred forty-five".