25124999 has 2 divisors, whose sum is σ = 25125000. Its totient is φ = 25124998.

The previous prime is 25124971. The next prime is 25125007. The reversal of 25124999 is 99942152.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25124999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25124909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12562499 + 12562500.

It is an arithmetic number, because the mean of its divisors is an integer number (12562500).

Almost surely, 2^25124999 is an apocalyptic number.

25124999 is a deficient number, since it is larger than the sum of its proper divisors (1).

25124999 is an equidigital number, since it uses as much as digits as its factorization.

25124999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 41.

The square root of 25124999 is about 5012.4843141899. The cubic root of 25124999 is about 292.8882962468. Note that the first 3 decimals are identical.

The spelling of 25124999 in words is "twenty-five million, one hundred twenty-four thousand, nine hundred ninety-nine".