25290047 has 4 divisors (see below), whose sum is σ = 25636560. Its totient is φ = 24943536.

The previous prime is 25290043. The next prime is 25290061. The reversal of 25290047 is 74009252.

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 25290047 - 2² = 25290043 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 (25290043) 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, 173147 + ... + 173292.

It is an arithmetic number, because the mean of its divisors is an integer number (6409140).

Almost surely, 2^25290047 is an apocalyptic number.

25290047 is a deficient number, since it is larger than the sum of its proper divisors (346513).

25290047 is an equidigital number, since it uses as much as digits as its factorization.

25290047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346512.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 25290047 is about 5028.9210572448. The cubic root of 25290047 is about 293.5282320742.

Adding to 25290047 its reverse (74009252), we get a palindrome (99299299).

The spelling of 25290047 in words is "twenty-five million, two hundred ninety thousand, forty-seven".