24981157 has 2 divisors, whose sum is σ = 24981158. Its totient is φ = 24981156.

The previous prime is 24981149. The next prime is 24981161. The reversal of 24981157 is 75118942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20079361 + 4901796 = 4481^2 + 2214^2 .

It is a cyclic number.

It is not a de Polignac number, because 24981157 - 2³ = 24981149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24981127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12490578 + 12490579.

It is an arithmetic number, because the mean of its divisors is an integer number (12490579).

Almost surely, 2^24981157 is an apocalyptic number.

It is an amenable number.

24981157 is a deficient number, since it is larger than the sum of its proper divisors (1).

24981157 is an equidigital number, since it uses as much as digits as its factorization.

24981157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 37.

The square root of 24981157 is about 4998.1153448075. The cubic root of 24981157 is about 292.3282923350.

It can be divided in two parts, 2498 and 1157, that added together give a triangular number (3655 = T₈₅).

The spelling of 24981157 in words is "twenty-four million, nine hundred eighty-one thousand, one hundred fifty-seven".