25430661 has 12 divisors (see below), whose sum is σ = 36792288. Its totient is φ = 16926504.

The previous prime is 25430659. The next prime is 25430677. The reversal of 25430661 is 16603452.

It is not a de Polignac number, because 25430661 - 2¹ = 25430659 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25430611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4786 + ... + 8588.

It is an arithmetic number, because the mean of its divisors is an integer number (3066024).

Almost surely, 2^25430661 is an apocalyptic number.

It is an amenable number.

25430661 is a deficient number, since it is larger than the sum of its proper divisors (11361627).

25430661 is a wasteful number, since it uses less digits than its factorization.

25430661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4552 (or 4549 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 25430661 is about 5042.8822115929. The cubic root of 25430661 is about 294.0712377699.

The spelling of 25430661 in words is "twenty-five million, four hundred thirty thousand, six hundred sixty-one".