142524021 has 4 divisors (see below), whose sum is σ = 190032032. Its totient is φ = 95016012.

The previous prime is 142524017. The next prime is 142524079. The reversal of 142524021 is 120425241.

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 not a de Polignac number, because 142524021 - 2² = 142524017 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 (142524091) 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, 23754001 + ... + 23754006.

It is an arithmetic number, because the mean of its divisors is an integer number (47508008).

Almost surely, 2^142524021 is an apocalyptic number.

It is an amenable number.

142524021 is a deficient number, since it is larger than the sum of its proper divisors (47508011).

142524021 is an equidigital number, since it uses as much as digits as its factorization.

142524021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47508010.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 142524021 is about 11938.3424728896. The cubic root of 142524021 is about 522.3513107584.

Adding to 142524021 its reverse (120425241), we get a palindrome (262949262).

The spelling of 142524021 in words is "one hundred forty-two million, five hundred twenty-four thousand, twenty-one".