142151021 has 8 divisors (see below), whose sum is σ = 143841984. Its totient is φ = 140466240.

The previous prime is 142150999. The next prime is 142151033. The reversal of 142151021 is 120151241.

142151021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142151021 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 (142151621) 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, 57605 + ... + 60021.

It is an arithmetic number, because the mean of its divisors is an integer number (17980248).

Almost surely, 2^142151021 is an apocalyptic number.

It is an amenable number.

142151021 is a deficient number, since it is larger than the sum of its proper divisors (1690963).

142151021 is a wasteful number, since it uses less digits than its factorization.

142151021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3091.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 142151021 is about 11922.7103042890. The cubic root of 142151021 is about 521.8952303152.

The spelling of 142151021 in words is "one hundred forty-two million, one hundred fifty-one thousand, twenty-one".