23425 has 6 divisors (see below), whose sum is σ = 29078. Its totient is φ = 18720.

The previous prime is 23417. The next prime is 23431. The reversal of 23425 is 52432.

23425 = T₂ + T₃ + ... + T₅₁.

It can be written as a sum of positive squares in 3 ways, for example, as 16 + 23409 = 4^2 + 153^2 .

It is not a de Polignac number, because 23425 - 2³ = 23417 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 23399 and 23408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 444 + ... + 493.

2²³⁴²⁵ is an apocalyptic number.

23425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23425 is a deficient number, since it is larger than the sum of its proper divisors (5653).

23425 is an equidigital number, since it uses as much as digits as its factorization.

23425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947 (or 942 counting only the distinct ones).

The product of its digits is 240, while the sum is 16.

The square root of 23425 is about 153.0522786501. The cubic root of 23425 is about 28.6127675402.

Subtracting from 23425 its sum of digits (16), we obtain a square (23409 = 153²).

Adding to 23425 its reverse (52432), we get a palindrome (75857).

The spelling of 23425 in words is "twenty-three thousand, four hundred twenty-five".