25791434 has 4 divisors (see below), whose sum is σ = 38687154. Its totient is φ = 12895716.

The previous prime is 25791433. The next prime is 25791439. The reversal of 25791434 is 43419752.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 25472209 + 319225 = 5047^2 + 565^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25791394 and 25791403.

It is not an unprimeable number, because it can be changed into a prime (25791433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6447857 + ... + 6447860.

Almost surely, 2^25791434 is an apocalyptic number.

25791434 is a deficient number, since it is larger than the sum of its proper divisors (12895720).

25791434 is a wasteful number, since it uses less digits than its factorization.

25791434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12895719.

The product of its digits is 30240, while the sum is 35.

The square root of 25791434 is about 5078.5267548769. The cubic root of 25791434 is about 295.4553305455.

The spelling of 25791434 in words is "twenty-five million, seven hundred ninety-one thousand, four hundred thirty-four".