25142443 has 4 divisors (see below), whose sum is σ = 25445448. Its totient is φ = 24839440.

The previous prime is 25142413. The next prime is 25142477. The reversal of 25142443 is 34424152.

It is a happy number.

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 25142443 - 2⁹ = 25141931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25142413) 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, 151378 + ... + 151543.

It is an arithmetic number, because the mean of its divisors is an integer number (6361362).

Almost surely, 2^25142443 is an apocalyptic number.

25142443 is a deficient number, since it is larger than the sum of its proper divisors (303005).

25142443 is an equidigital number, since it uses as much as digits as its factorization.

25142443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303004.

The product of its digits is 3840, while the sum is 25.

The square root of 25142443 is about 5014.2240675901. The cubic root of 25142443 is about 292.9560635661.

Adding to 25142443 its reverse (34424152), we get a palindrome (59566595).

The spelling of 25142443 in words is "twenty-five million, one hundred forty-two thousand, four hundred forty-three".