25661430 has 48 divisors (see below), whose sum is σ = 67055040. Its totient is φ = 6808704.

The previous prime is 25661429. The next prime is 25661443. The reversal of 25661430 is 3416652.

It is a junction number, because it is equal to n+sod(n) for n = 25661394 and 25661403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20914 + ... + 22106.

It is an arithmetic number, because the mean of its divisors is an integer number (1396980).

Almost surely, 2^25661430 is an apocalyptic number.

25661430 is an abundant number, since it is smaller than the sum of its proper divisors (41393610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25661430 is a wasteful number, since it uses less digits than its factorization.

25661430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445 (or 1442 counting only the distinct ones).

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

The square root of 25661430 is about 5065.7112037699. The cubic root of 25661430 is about 294.9580712218.

The spelling of 25661430 in words is "twenty-five million, six hundred sixty-one thousand, four hundred thirty".