25040023 has 4 divisors (see below), whose sum is σ = 25078680. Its totient is φ = 25001368.

The previous prime is 25040017. The next prime is 25040047. The reversal of 25040023 is 32004052.

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 25040023 - 2¹⁷ = 24908951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25039979 and 25040006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25340023) 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, 18340 + ... + 19657.

It is an arithmetic number, because the mean of its divisors is an integer number (6269670).

Almost surely, 2^25040023 is an apocalyptic number.

25040023 is a deficient number, since it is larger than the sum of its proper divisors (38657).

25040023 is an equidigital number, since it uses as much as digits as its factorization.

25040023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38656.

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

The square root of 25040023 is about 5004.0006994404. Note that the first 3 decimals coincide. The cubic root of 25040023 is about 292.5577279101.

Adding to 25040023 its reverse (32004052), we get a palindrome (57044075).

It can be divided in two parts, 2 and 5040023, that added together give a square (5040025 = 2245²).

The spelling of 25040023 in words is "twenty-five million, forty thousand, twenty-three".