142124021 has 8 divisors (see below), whose sum is σ = 153515544. Its totient is φ = 130798080.

The previous prime is 142123997. The next prime is 142124033. The reversal of 142124021 is 120421241.

It can be written as a sum of positive squares in 4 ways, for example, as 17556100 + 124567921 = 4190^2 + 11161^2 .

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 142124021 - 2²² = 137929717 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142124071) 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, 11840 + ... + 20601.

It is an arithmetic number, because the mean of its divisors is an integer number (19189443).

Almost surely, 2^142124021 is an apocalyptic number.

It is an amenable number.

142124021 is a deficient number, since it is larger than the sum of its proper divisors (11391523).

142124021 is a wasteful number, since it uses less digits than its factorization.

142124021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32791.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 142124021 is about 11921.5779576363. The cubic root of 142124021 is about 521.8621854982.

Adding to 142124021 its reverse (120421241), we get a palindrome (262545262).

The spelling of 142124021 in words is "one hundred forty-two million, one hundred twenty-four thousand, twenty-one".