25428797 has 4 divisors (see below), whose sum is σ = 25467036. Its totient is φ = 25390560.

The previous prime is 25428779. The next prime is 25428811. The reversal of 25428797 is 79782452.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15531481 + 9897316 = 3941^2 + 3146^2 .

It is a cyclic number.

It is not a de Polignac number, because 25428797 - 2²⁰ = 24380221 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 (25428727) 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, 18104 + ... + 19457.

It is an arithmetic number, because the mean of its divisors is an integer number (6366759).

Almost surely, 2^25428797 is an apocalyptic number.

It is an amenable number.

25428797 is a deficient number, since it is larger than the sum of its proper divisors (38239).

25428797 is an equidigital number, since it uses as much as digits as its factorization.

25428797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38238.

The product of its digits is 282240, while the sum is 44.

The square root of 25428797 is about 5042.6973932609. The cubic root of 25428797 is about 294.0640527138.

The spelling of 25428797 in words is "twenty-five million, four hundred twenty-eight thousand, seven hundred ninety-seven".