25725047 has 4 divisors (see below), whose sum is σ = 25965576. Its totient is φ = 25484520.

The previous prime is 25725043. The next prime is 25725053. The reversal of 25725047 is 74052752.

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 25725047 - 2² = 25725043 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25725043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120104 + ... + 120317.

It is an arithmetic number, because the mean of its divisors is an integer number (6491394).

Almost surely, 2^25725047 is an apocalyptic number.

25725047 is a deficient number, since it is larger than the sum of its proper divisors (240529).

25725047 is a wasteful number, since it uses less digits than its factorization.

25725047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240528.

The product of its (nonzero) digits is 19600, while the sum is 32.

The square root of 25725047 is about 5071.9864944615. The cubic root of 25725047 is about 295.2016126348.

Adding to 25725047 its reverse (74052752), we get a palindrome (99777799).

The spelling of 25725047 in words is "twenty-five million, seven hundred twenty-five thousand, forty-seven".