25121651 has 2 divisors, whose sum is σ = 25121652. Its totient is φ = 25121650.

The previous prime is 25121633. The next prime is 25121653. The reversal of 25121651 is 15612152.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25121651 - 2⁶ = 25121587 is a prime.

Together with 25121653, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25121653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12560825 + 12560826.

It is an arithmetic number, because the mean of its divisors is an integer number (12560826).

Almost surely, 2^25121651 is an apocalyptic number.

25121651 is a deficient number, since it is larger than the sum of its proper divisors (1).

25121651 is an equidigital number, since it uses as much as digits as its factorization.

25121651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 600, while the sum is 23.

The square root of 25121651 is about 5012.1503369312. The cubic root of 25121651 is about 292.8752861823.

The spelling of 25121651 in words is "twenty-five million, one hundred twenty-one thousand, six hundred fifty-one".