25605434 has 16 divisors (see below), whose sum is σ = 42071400. Its totient is φ = 11633664.

The previous prime is 25605431. The next prime is 25605439. The reversal of 25605434 is 43450652.

It can be written as a sum of positive squares in 4 ways, for example, as 21390625 + 4214809 = 4625^2 + 2053^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 25605397 and 25605406.

It is not an unprimeable number, because it can be changed into a prime (25605431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11999 + ... + 13970.

Almost surely, 2^25605434 is an apocalyptic number.

25605434 is a deficient number, since it is larger than the sum of its proper divisors (16465966).

25605434 is a wasteful number, since it uses less digits than its factorization.

25605434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26017.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 25605434 is about 5060.1812220512. The cubic root of 25605434 is about 294.7433715692.

The spelling of 25605434 in words is "twenty-five million, six hundred five thousand, four hundred thirty-four".