25578235 has 4 divisors (see below), whose sum is σ = 30693888. Its totient is φ = 20462584.

The previous prime is 25578233. The next prime is 25578253. The reversal of 25578235 is 53287552.

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 25578235 - 2¹ = 25578233 is a prime.

It is a super-2 number, since 2×25578235² = 1308492211430450, 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 = 25578194 and 25578203.

It is not an unprimeable number, because it can be changed into a prime (25578233) 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, 2557819 + ... + 2557828.

It is an arithmetic number, because the mean of its divisors is an integer number (7673472).

Almost surely, 2^25578235 is an apocalyptic number.

25578235 is a deficient number, since it is larger than the sum of its proper divisors (5115653).

25578235 is an equidigital number, since it uses as much as digits as its factorization.

25578235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5115652.

The product of its digits is 84000, while the sum is 37.

The square root of 25578235 is about 5057.4929560010. The cubic root of 25578235 is about 294.6389723079.

The spelling of 25578235 in words is "twenty-five million, five hundred seventy-eight thousand, two hundred thirty-five".