25121237 has 2 divisors, whose sum is σ = 25121238. Its totient is φ = 25121236.

The previous prime is 25121227. The next prime is 25121263. The reversal of 25121237 is 73212152.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24542116 + 579121 = 4954^2 + 761^2 .

It is a cyclic number.

It is not a de Polignac number, because 25121237 - 2²⁰ = 24072661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25121207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12560618 + 12560619.

It is an arithmetic number, because the mean of its divisors is an integer number (12560619).

Almost surely, 2^25121237 is an apocalyptic number.

It is an amenable number.

25121237 is a deficient number, since it is larger than the sum of its proper divisors (1).

25121237 is an equidigital number, since it uses as much as digits as its factorization.

25121237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 23.

The square root of 25121237 is about 5012.1090371220. The cubic root of 25121237 is about 292.8736773305.

Adding to 25121237 its reverse (73212152), we get a palindrome (98333389).

The spelling of 25121237 in words is "twenty-five million, one hundred twenty-one thousand, two hundred thirty-seven".