25216749 has 12 divisors (see below), whose sum is σ = 36587616. Its totient is φ = 16735752.

The previous prime is 25216727. The next prime is 25216753. The reversal of 25216749 is 94761252.

It is not a de Polignac number, because 25216749 - 2⁸ = 25216493 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25216949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4129 + ... + 8214.

It is an arithmetic number, because the mean of its divisors is an integer number (3048968).

Almost surely, 2^25216749 is an apocalyptic number.

It is an amenable number.

25216749 is a deficient number, since it is larger than the sum of its proper divisors (11370867).

25216749 is a wasteful number, since it uses less digits than its factorization.

25216749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12576 (or 12573 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 25216749 is about 5021.6281224320. The cubic root of 25216749 is about 293.2443805980.

The spelling of 25216749 in words is "twenty-five million, two hundred sixteen thousand, seven hundred forty-nine".