25405927 has 4 divisors (see below), whose sum is σ = 25419240. Its totient is φ = 25392616.

The previous prime is 25405889. The next prime is 25405987. The reversal of 25405927 is 72950452.

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 25405927 - 2¹⁹ = 24881639 is a prime.

It is a super-2 number, since 2×25405927² = 1290922253458658, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25405892 and 25405901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25405987) 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, 3193 + ... + 7810.

It is an arithmetic number, because the mean of its divisors is an integer number (6354810).

Almost surely, 2^25405927 is an apocalyptic number.

25405927 is a deficient number, since it is larger than the sum of its proper divisors (13313).

25405927 is a wasteful number, since it uses less digits than its factorization.

25405927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13312.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 25405927 is about 5040.4292475939. The cubic root of 25405927 is about 293.9758684128.

The spelling of 25405927 in words is "twenty-five million, four hundred five thousand, nine hundred twenty-seven".