25154149 has 2 divisors, whose sum is σ = 25154150. Its totient is φ = 25154148.

The previous prime is 25154147. The next prime is 25154179. The reversal of 25154149 is 94145152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25070049 + 84100 = 5007^2 + 290^2 .

It is a cyclic number.

It is not a de Polignac number, because 25154149 - 2¹ = 25154147 is a prime.

Together with 25154147, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 25154149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25154141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12577074 + 12577075.

It is an arithmetic number, because the mean of its divisors is an integer number (12577075).

Almost surely, 2^25154149 is an apocalyptic number.

It is an amenable number.

25154149 is a deficient number, since it is larger than the sum of its proper divisors (1).

25154149 is an equidigital number, since it uses as much as digits as its factorization.

25154149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 31.

The square root of 25154149 is about 5015.3912110622. The cubic root of 25154149 is about 293.0015220444.

The spelling of 25154149 in words is "twenty-five million, one hundred fifty-four thousand, one hundred forty-nine".