142231541 has 4 divisors (see below), whose sum is σ = 145257792. Its totient is φ = 139205292.

The previous prime is 142231493. The next prime is 142231561. The reversal of 142231541 is 145132241.

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 a de Polignac number, because none of the positive numbers 2^k-142231541 is a prime.

It is a super-2 number, since 2×142231541² = 40459622510469362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142231561) 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, 1513055 + ... + 1513148.

It is an arithmetic number, because the mean of its divisors is an integer number (36314448).

Almost surely, 2^142231541 is an apocalyptic number.

It is an amenable number.

142231541 is a deficient number, since it is larger than the sum of its proper divisors (3026251).

142231541 is an equidigital number, since it uses as much as digits as its factorization.

142231541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3026250.

The product of its digits is 960, while the sum is 23.

The square root of 142231541 is about 11926.0865752350. The cubic root of 142231541 is about 521.9937524636.

Adding to 142231541 its reverse (145132241), we get a palindrome (287363782).

The spelling of 142231541 in words is "one hundred forty-two million, two hundred thirty-one thousand, five hundred forty-one".