25121090 has 8 divisors (see below), whose sum is σ = 45217980. Its totient is φ = 10048432.

The previous prime is 25121011. The next prime is 25121093. The reversal of 25121090 is 9012152.

It can be written as a sum of positive squares in 2 ways, for example, as 24078649 + 1042441 = 4907^2 + 1021^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (25121093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1256045 + ... + 1256064.

Almost surely, 2^25121090 is an apocalyptic number.

25121090 is a deficient number, since it is larger than the sum of its proper divisors (20096890).

25121090 is a wasteful number, since it uses less digits than its factorization.

25121090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2512116.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 25121090 is about 5012.0943726151. The cubic root of 25121090 is about 292.8731060673.

The spelling of 25121090 in words is "twenty-five million, one hundred twenty-one thousand, ninety".