25332721 has 2 divisors, whose sum is σ = 25332722. Its totient is φ = 25332720.

The previous prime is 25332709. The next prime is 25332761. The reversal of 25332721 is 12723352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14861025 + 10471696 = 3855^2 + 3236^2 .

It is a cyclic number.

It is not a de Polignac number, because 25332721 - 2¹¹ = 25330673 is a prime.

It is not a weakly prime, because it can be changed into another prime (25332761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12666360 + 12666361.

It is an arithmetic number, because the mean of its divisors is an integer number (12666361).

Almost surely, 2^25332721 is an apocalyptic number.

It is an amenable number.

25332721 is a deficient number, since it is larger than the sum of its proper divisors (1).

25332721 is an equidigital number, since it uses as much as digits as its factorization.

25332721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 25.

The square root of 25332721 is about 5033.1621273311. The cubic root of 25332721 is about 293.6932375006.

The spelling of 25332721 in words is "twenty-five million, three hundred thirty-two thousand, seven hundred twenty-one".