25649745 has 16 divisors (see below), whose sum is σ = 44770752. Its totient is φ = 12436160.

The previous prime is 25649731. The next prime is 25649747. The reversal of 25649745 is 54794652.

It is not a de Polignac number, because 25649745 - 2⁶ = 25649681 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25649697 and 25649706.

It is not an unprimeable number, because it can be changed into a prime (25649747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77562 + ... + 77891.

It is an arithmetic number, because the mean of its divisors is an integer number (2798172).

Almost surely, 2^25649745 is an apocalyptic number.

It is an amenable number.

25649745 is a deficient number, since it is larger than the sum of its proper divisors (19121007).

25649745 is a wasteful number, since it uses less digits than its factorization.

25649745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155472.

The product of its digits is 302400, while the sum is 42.

The square root of 25649745 is about 5064.5577299504. The cubic root of 25649745 is about 294.9132944455.

The spelling of 25649745 in words is "twenty-five million, six hundred forty-nine thousand, seven hundred forty-five".