25413021 has 10 divisors (see below), whose sum is σ = 37962782. Its totient is φ = 16941960.

The previous prime is 25413001. The next prime is 25413029. The reversal of 25413021 is 12031452.

It can be written as a sum of positive squares in only one way, i.e., 24147396 + 1265625 = 4914^2 + 1125^2 .

It is a de Polignac number, because none of the positive numbers 2^k-25413021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25412985 and 25413003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25413029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 156790 + ... + 156951.

Almost surely, 2^25413021 is an apocalyptic number.

It is an amenable number.

25413021 is a deficient number, since it is larger than the sum of its proper divisors (12549761).

25413021 is an equidigital number, since it uses as much as digits as its factorization.

25413021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313753 (or 313744 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 25413021 is about 5041.1329083848. The cubic root of 25413021 is about 294.0032277863.

Adding to 25413021 its reverse (12031452), we get a palindrome (37444473).

The spelling of 25413021 in words is "twenty-five million, four hundred thirteen thousand, twenty-one".