25131761 has 2 divisors, whose sum is σ = 25131762. Its totient is φ = 25131760.

The previous prime is 25131751. The next prime is 25131781. The reversal of 25131761 is 16713152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22619536 + 2512225 = 4756^2 + 1585^2 .

It is a cyclic number.

It is not a de Polignac number, because 25131761 - 2⁶ = 25131697 is a prime.

It is a super-2 number, since 2×25131761² = 1263210821922242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25131761.

It is not a weakly prime, because it can be changed into another prime (25131751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12565880 + 12565881.

It is an arithmetic number, because the mean of its divisors is an integer number (12565881).

Almost surely, 2^25131761 is an apocalyptic number.

It is an amenable number.

25131761 is a deficient number, since it is larger than the sum of its proper divisors (1).

25131761 is an equidigital number, since it uses as much as digits as its factorization.

25131761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 26.

The square root of 25131761 is about 5013.1587846387. The cubic root of 25131761 is about 292.9145693226.

The spelling of 25131761 in words is "twenty-five million, one hundred thirty-one thousand, seven hundred sixty-one".