25059649 has 4 divisors (see below), whose sum is σ = 26533764. Its totient is φ = 23585536.

The previous prime is 25059647. The next prime is 25059653. The reversal of 25059649 is 94695052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20930625 + 4129024 = 4575^2 + 2032^2 .

It is a cyclic number.

It is not a de Polignac number, because 25059649 - 2¹ = 25059647 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25059647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 737032 + ... + 737065.

It is an arithmetic number, because the mean of its divisors is an integer number (6633441).

Almost surely, 2^25059649 is an apocalyptic number.

It is an amenable number.

25059649 is a deficient number, since it is larger than the sum of its proper divisors (1474115).

25059649 is a wasteful number, since it uses less digits than its factorization.

25059649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474114.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 25059649 is about 5005.9613462351. The cubic root of 25059649 is about 292.6341420908.

The spelling of 25059649 in words is "twenty-five million, fifty-nine thousand, six hundred forty-nine".