25434947 has 4 divisors (see below), whose sum is σ = 26122416. Its totient is φ = 24747480.

The previous prime is 25434917. The next prime is 25434949. The reversal of 25434947 is 74943452.

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

It is a cyclic number.

It is not a de Polignac number, because 25434947 - 2⁸ = 25434691 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25434947.

It is not an unprimeable number, because it can be changed into a prime (25434949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343679 + ... + 343752.

It is an arithmetic number, because the mean of its divisors is an integer number (6530604).

Almost surely, 2^25434947 is an apocalyptic number.

25434947 is a deficient number, since it is larger than the sum of its proper divisors (687469).

25434947 is an equidigital number, since it uses as much as digits as its factorization.

25434947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687468.

The product of its digits is 120960, while the sum is 38.

The square root of 25434947 is about 5043.3071490838. The cubic root of 25434947 is about 294.0877574418.

The spelling of 25434947 in words is "twenty-five million, four hundred thirty-four thousand, nine hundred forty-seven".