25142321 has 4 divisors (see below), whose sum is σ = 25677312. Its totient is φ = 24607332.

The previous prime is 25142311. The next prime is 25142329. The reversal of 25142321 is 12324152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25142321 - 2¹⁰ = 25141297 is a prime.

It is a super-3 number, since 3×25142321³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25142293 and 25142302.

It is not an unprimeable number, because it can be changed into a prime (25142329) 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, 267425 + ... + 267518.

It is an arithmetic number, because the mean of its divisors is an integer number (6419328).

Almost surely, 2^25142321 is an apocalyptic number.

It is an amenable number.

25142321 is a deficient number, since it is larger than the sum of its proper divisors (534991).

25142321 is an equidigital number, since it uses as much as digits as its factorization.

25142321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534990.

The product of its digits is 480, while the sum is 20.

The square root of 25142321 is about 5014.2119021836. The cubic root of 25142321 is about 292.9555897233.

Adding to 25142321 its reverse (12324152), we get a palindrome (37466473).

The spelling of 25142321 in words is "twenty-five million, one hundred forty-two thousand, three hundred twenty-one".