25379905 has 8 divisors (see below), whose sum is σ = 30486312. Its totient is φ = 20283648.

The previous prime is 25379903. The next prime is 25379941. The reversal of 25379905 is 50997352.

It can be written as a sum of positive squares in 4 ways, for example, as 4210704 + 21169201 = 2052^2 + 4601^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25379905 - 2¹ = 25379903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25379903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5017 + ... + 8713.

It is an arithmetic number, because the mean of its divisors is an integer number (3810789).

Almost surely, 2^25379905 is an apocalyptic number.

It is an amenable number.

25379905 is a deficient number, since it is larger than the sum of its proper divisors (5106407).

25379905 is a wasteful number, since it uses less digits than its factorization.

25379905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5075.

The product of its (nonzero) digits is 85050, while the sum is 40.

The square root of 25379905 is about 5037.8472585024. The cubic root of 25379905 is about 293.8754659449.

The spelling of 25379905 in words is "twenty-five million, three hundred seventy-nine thousand, nine hundred five".