142651021 has 8 divisors (see below), whose sum is σ = 148274784. Its totient is φ = 137120400.

The previous prime is 142650997. The next prime is 142651027. The reversal of 142651021 is 120156241.

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 142651021 - 2¹¹ = 142648973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142650983 and 142651001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142651027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20155 + ... + 26296.

It is an arithmetic number, because the mean of its divisors is an integer number (18534348).

Almost surely, 2^142651021 is an apocalyptic number.

It is an amenable number.

142651021 is a deficient number, since it is larger than the sum of its proper divisors (5623763).

142651021 is an equidigital number, since it uses as much as digits as its factorization.

142651021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46571.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 142651021 is about 11943.6602848541. The cubic root of 142651021 is about 522.5064165936.

The spelling of 142651021 in words is "one hundred forty-two million, six hundred fifty-one thousand, twenty-one".