25798123 has 4 divisors (see below), whose sum is σ = 27782608. Its totient is φ = 23813640.

The previous prime is 25798103. The next prime is 25798133. The reversal of 25798123 is 32189752.

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 25798123 - 2¹³ = 25789931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25798103) 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, 992223 + ... + 992248.

It is an arithmetic number, because the mean of its divisors is an integer number (6945652).

Almost surely, 2^25798123 is an apocalyptic number.

25798123 is a deficient number, since it is larger than the sum of its proper divisors (1984485).

25798123 is a wasteful number, since it uses less digits than its factorization.

25798123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984484.

The product of its digits is 30240, while the sum is 37.

The square root of 25798123 is about 5079.1852693124. The cubic root of 25798123 is about 295.4808704189.

It can be divided in two parts, 25798 and 123, that added together give a square (25921 = 161²).

The spelling of 25798123 in words is "twenty-five million, seven hundred ninety-eight thousand, one hundred twenty-three".