23145725 has 12 divisors (see below), whose sum is σ = 28888404. Its totient is φ = 18395520.

The previous prime is 23145713. The next prime is 23145791. The reversal of 23145725 is 52754132.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 4 + 23145721 = 2^2 + 4811^2 .

It is not a de Polignac number, because 23145725 - 2⁴ = 23145709 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 11 ways as a sum of consecutive naturals, for example, 977 + ... + 6873.

It is an arithmetic number, because the mean of its divisors is an integer number (2407367).

Almost surely, 2^23145725 is an apocalyptic number.

23145725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23145725 is a deficient number, since it is larger than the sum of its proper divisors (5742679).

23145725 is a wasteful number, since it uses less digits than its factorization.

23145725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6064 (or 6059 counting only the distinct ones).

The product of its digits is 8400, while the sum is 29.

The square root of 23145725 is about 4811.0004157140. Note that the first 3 decimals coincide. The cubic root of 23145725 is about 284.9860463057.

Adding to 23145725 its reverse (52754132), we get a palindrome (75899857).

The spelling of 23145725 in words is "twenty-three million, one hundred forty-five thousand, seven hundred twenty-five".