25661426 has 16 divisors (see below), whose sum is σ = 44056320. Its totient is φ = 10981440.

The previous prime is 25661407. The next prime is 25661429. The reversal of 25661426 is 62416652.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25661392 and 25661401.

It is not an unprimeable number, because it can be changed into a prime (25661429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16490 + ... + 17978.

It is an arithmetic number, because the mean of its divisors is an integer number (2753520).

Almost surely, 2^25661426 is an apocalyptic number.

25661426 is a deficient number, since it is larger than the sum of its proper divisors (18394894).

25661426 is a wasteful number, since it uses less digits than its factorization.

25661426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2729.

The product of its digits is 17280, while the sum is 32.

The square root of 25661426 is about 5065.7108089586. The cubic root of 25661426 is about 294.9580558961.

The spelling of 25661426 in words is "twenty-five million, six hundred sixty-one thousand, four hundred twenty-six".