25154749 has 2 divisors, whose sum is σ = 25154750. Its totient is φ = 25154748.

The previous prime is 25154743. The next prime is 25154761. The reversal of 25154749 is 94745152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22325625 + 2829124 = 4725^2 + 1682^2 .

It is a cyclic number.

It is not a de Polignac number, because 25154749 - 2³ = 25154741 is a prime.

It is a super-2 number, since 2×25154749² = 1265522794506002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25154741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12577374 + 12577375.

It is an arithmetic number, because the mean of its divisors is an integer number (12577375).

Almost surely, 2^25154749 is an apocalyptic number.

It is an amenable number.

25154749 is a deficient number, since it is larger than the sum of its proper divisors (1).

25154749 is an equidigital number, since it uses as much as digits as its factorization.

25154749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 37.

The square root of 25154749 is about 5015.4510265778. The cubic root of 25154749 is about 293.0038516735.

The spelling of 25154749 in words is "twenty-five million, one hundred fifty-four thousand, seven hundred forty-nine".