25578243 has 12 divisors (see below), whose sum is σ = 37293048. Its totient is φ = 16892160.

The previous prime is 25578233. The next prime is 25578253. The reversal of 25578243 is 34287552.

It is an interprime number because it is at equal distance from previous prime (25578233) and next prime (25578253).

It is not a de Polignac number, because 25578243 - 2⁴ = 25578227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25578198 and 25578207.

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 11 ways as a sum of consecutive naturals, for example, 12318 + ... + 14243.

It is an arithmetic number, because the mean of its divisors is an integer number (3107754).

Almost surely, 2^25578243 is an apocalyptic number.

25578243 is a deficient number, since it is larger than the sum of its proper divisors (11714805).

25578243 is a wasteful number, since it uses less digits than its factorization.

25578243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26674 (or 26671 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 25578243 is about 5057.4937469067. The cubic root of 25578243 is about 294.6390030255.

The spelling of 25578243 in words is "twenty-five million, five hundred seventy-eight thousand, two hundred forty-three".