25049421 has 12 divisors (see below), whose sum is σ = 36228348. Its totient is φ = 16678464.

The previous prime is 25049411. The next prime is 25049471. The reversal of 25049421 is 12494052.

It can be written as a sum of positive squares in 2 ways, for example, as 10692900 + 14356521 = 3270^2 + 3789^2 .

It is not a de Polignac number, because 25049421 - 2⁵ = 25049389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25049411) 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, 9571 + ... + 11903.

It is an arithmetic number, because the mean of its divisors is an integer number (3019029).

Almost surely, 2^25049421 is an apocalyptic number.

It is an amenable number.

25049421 is a deficient number, since it is larger than the sum of its proper divisors (11178927).

25049421 is a wasteful number, since it uses less digits than its factorization.

25049421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3532 (or 3529 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 25049421 is about 5004.9396599759. The cubic root of 25049421 is about 292.5943241707.

The spelling of 25049421 in words is "twenty-five million, forty-nine thousand, four hundred twenty-one".