25436423 has 4 divisors (see below), whose sum is σ = 25512240. Its totient is φ = 25360608.

The previous prime is 25436419. The next prime is 25436479. The reversal of 25436423 is 32463452.

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 25436423 - 2² = 25436419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25436623) 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, 37403 + ... + 38076.

It is an arithmetic number, because the mean of its divisors is an integer number (6378060).

Almost surely, 2^25436423 is an apocalyptic number.

25436423 is a deficient number, since it is larger than the sum of its proper divisors (75817).

25436423 is an equidigital number, since it uses as much as digits as its factorization.

25436423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75816.

The product of its digits is 17280, while the sum is 29.

The square root of 25436423 is about 5043.4534795118. The cubic root of 25436423 is about 294.0934460079.

Adding to 25436423 its reverse (32463452), we get a palindrome (57899875).

The spelling of 25436423 in words is "twenty-five million, four hundred thirty-six thousand, four hundred twenty-three".