25454779 has 16 divisors (see below), whose sum is σ = 30916800. Its totient is φ = 20490624.

The previous prime is 25454773. The next prime is 25454789. The reversal of 25454779 is 97745452.

It is not a de Polignac number, because 25454779 - 2⁷ = 25454651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25454773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5817 + ... + 9205.

It is an arithmetic number, because the mean of its divisors is an integer number (1932300).

Almost surely, 2^25454779 is an apocalyptic number.

25454779 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

25454779 is a deficient number, since it is larger than the sum of its proper divisors (5462021).

25454779 is a wasteful number, since it uses less digits than its factorization.

25454779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3462.

The product of its digits is 352800, while the sum is 43.

The square root of 25454779 is about 5045.2729361255. The cubic root of 25454779 is about 294.1641724258.

The spelling of 25454779 in words is "twenty-five million, four hundred fifty-four thousand, seven hundred seventy-nine".