142132021 has 4 divisors (see below), whose sum is σ = 143729100. Its totient is φ = 140534944.

The previous prime is 142132009. The next prime is 142132031. The reversal of 142132021 is 120231241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22667121 + 119464900 = 4761^2 + 10930^2 .

It is a cyclic number.

It is not a de Polignac number, because 142132021 - 2⁷ = 142131893 is a prime.

It is a super-2 number, since 2×142132021² = 40403022787088882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142131986 and 142132004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142132031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 798406 + ... + 798583.

It is an arithmetic number, because the mean of its divisors is an integer number (35932275).

Almost surely, 2^142132021 is an apocalyptic number.

It is an amenable number.

142132021 is a deficient number, since it is larger than the sum of its proper divisors (1597079).

142132021 is an equidigital number, since it uses as much as digits as its factorization.

142132021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597078.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 142132021 is about 11921.9134789680. The cubic root of 142132021 is about 521.8719769913.

Adding to 142132021 its reverse (120231241), we get a palindrome (262363262).

The spelling of 142132021 in words is "one hundred forty-two million, one hundred thirty-two thousand, twenty-one".