25401605 has 8 divisors (see below), whose sum is σ = 31191072. Its totient is φ = 19848528.

The previous prime is 25401589. The next prime is 25401611. The reversal of 25401605 is 50610452.

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 25401605 - 2⁴ = 25401589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58859 + ... + 59288.

It is an arithmetic number, because the mean of its divisors is an integer number (3898884).

Almost surely, 2^25401605 is an apocalyptic number.

It is an amenable number.

25401605 is a deficient number, since it is larger than the sum of its proper divisors (5789467).

25401605 is a wasteful number, since it uses less digits than its factorization.

25401605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118195.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 25401605 is about 5040.0004960317. Note that the first 3 decimals coincide. The cubic root of 25401605 is about 293.9591972930.

The spelling of 25401605 in words is "twenty-five million, four hundred one thousand, six hundred five".