25150921 has 2 divisors, whose sum is σ = 25150922. Its totient is φ = 25150920.

The previous prime is 25150903. The next prime is 25150943. The reversal of 25150921 is 12905152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17338896 + 7812025 = 4164^2 + 2795^2 .

It is a cyclic number.

It is not a de Polignac number, because 25150921 - 2¹¹ = 25148873 is a prime.

It is not a weakly prime, because it can be changed into another prime (25150901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12575460 + 12575461.

It is an arithmetic number, because the mean of its divisors is an integer number (12575461).

Almost surely, 2^25150921 is an apocalyptic number.

It is an amenable number.

25150921 is a deficient number, since it is larger than the sum of its proper divisors (1).

25150921 is an equidigital number, since it uses as much as digits as its factorization.

25150921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 25150921 is about 5015.0693913445. The cubic root of 25150921 is about 292.9889880038.

The spelling of 25150921 in words is "twenty-five million, one hundred fifty thousand, nine hundred twenty-one".