142976021 has 8 divisors (see below), whose sum is σ = 146313984. Its totient is φ = 139650480.

The previous prime is 142975993. The next prime is 142976047. The reversal of 142976021 is 120679241.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142976021 - 2¹⁸ = 142713877 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 (142973021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22616 + ... + 28238.

It is an arithmetic number, because the mean of its divisors is an integer number (18289248).

Almost surely, 2^142976021 is an apocalyptic number.

It is an amenable number.

142976021 is a deficient number, since it is larger than the sum of its proper divisors (3337963).

142976021 is an equidigital number, since it uses as much as digits as its factorization.

142976021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6211.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 142976021 is about 11957.2580887091. The cubic root of 142976021 is about 522.9029221941.

The spelling of 142976021 in words is "one hundred forty-two million, nine hundred seventy-six thousand, twenty-one".