25234921 has 2 divisors, whose sum is σ = 25234922. Its totient is φ = 25234920.

The previous prime is 25234877. The next prime is 25234927. The reversal of 25234921 is 12943252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24651225 + 583696 = 4965^2 + 764^2 .

It is a cyclic number.

It is not a de Polignac number, because 25234921 - 2¹⁵ = 25202153 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 25234921.

It is not a weakly prime, because it can be changed into another prime (25234927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12617460 + 12617461.

It is an arithmetic number, because the mean of its divisors is an integer number (12617461).

Almost surely, 2^25234921 is an apocalyptic number.

It is an amenable number.

25234921 is a deficient number, since it is larger than the sum of its proper divisors (1).

25234921 is an equidigital number, since it uses as much as digits as its factorization.

25234921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 28.

The square root of 25234921 is about 5023.4371699067. The cubic root of 25234921 is about 293.3148041269.

The spelling of 25234921 in words is "twenty-five million, two hundred thirty-four thousand, nine hundred twenty-one".