25390641 has 16 divisors (see below), whose sum is σ = 34525440. Its totient is φ = 16594560.

The previous prime is 25390637. The next prime is 25390649. The reversal of 25390641 is 14609352.

It is not a de Polignac number, because 25390641 - 2² = 25390637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25390599 and 25390608.

It is not an unprimeable number, because it can be changed into a prime (25390649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58696 + ... + 59126.

It is an arithmetic number, because the mean of its divisors is an integer number (2157840).

Almost surely, 2^25390641 is an apocalyptic number.

It is an amenable number.

25390641 is a deficient number, since it is larger than the sum of its proper divisors (9134799).

25390641 is a wasteful number, since it uses less digits than its factorization.

25390641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 25390641 is about 5038.9126803309. The cubic root of 25390641 is about 293.9168977027.

Adding to 25390641 its reverse (14609352), we get a palindrome (39999993).

The spelling of 25390641 in words is "twenty-five million, three hundred ninety thousand, six hundred forty-one".