142113021 has 48 divisors (see below), whose sum is σ = 214056960. Its totient is φ = 83603520.

The previous prime is 142113019. The next prime is 142113031. The reversal of 142113021 is 120311241.

It is not a de Polignac number, because 142113021 - 2¹ = 142113019 is a prime.

It is a super-2 number, since 2×142113021² = 40392221475492882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142113031) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1798860 + ... + 1798938.

It is an arithmetic number, because the mean of its divisors is an integer number (4459520).

Almost surely, 2^142113021 is an apocalyptic number.

It is an amenable number.

142113021 is a deficient number, since it is larger than the sum of its proper divisors (71943939).

142113021 is a wasteful number, since it uses less digits than its factorization.

142113021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 142113021 is about 11921.1166003861. The cubic root of 142113021 is about 521.8487215950.

Adding to 142113021 its reverse (120311241), we get a palindrome (262424262).

The spelling of 142113021 in words is "one hundred forty-two million, one hundred thirteen thousand, twenty-one".