25605426 has 64 divisors (see below), whose sum is σ = 67230720. Its totient is φ = 6298560.

The previous prime is 25605409. The next prime is 25605431. The reversal of 25605426 is 62450652.

It is a junction number, because it is equal to n+sod(n) for n = 25605393 and 25605402.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7320 + ... + 10236.

It is an arithmetic number, because the mean of its divisors is an integer number (1050480).

Almost surely, 2^25605426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25605426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33615360).

25605426 is an abundant number, since it is smaller than the sum of its proper divisors (41625294).

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

25605426 is a wasteful number, since it uses less digits than its factorization.

25605426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2959.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 25605426 is about 5060.1804315657. The cubic root of 25605426 is about 294.7433408733.

The spelling of 25605426 in words is "twenty-five million, six hundred five thousand, four hundred twenty-six".