142724121 has 4 divisors (see below), whose sum is σ = 190298832. Its totient is φ = 95149412.

The previous prime is 142724119. The next prime is 142724149. The reversal of 142724121 is 121427241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 142724121 - 2¹ = 142724119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142724091 and 142724100.

It is not an unprimeable number, because it can be changed into a prime (142724171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23787351 + ... + 23787356.

It is an arithmetic number, because the mean of its divisors is an integer number (47574708).

Almost surely, 2^142724121 is an apocalyptic number.

It is an amenable number.

142724121 is a deficient number, since it is larger than the sum of its proper divisors (47574711).

142724121 is an equidigital number, since it uses as much as digits as its factorization.

142724121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47574710.

The product of its digits is 896, while the sum is 24.

The square root of 142724121 is about 11946.7200938165. The cubic root of 142724121 is about 522.5956523065.

It can be divided in two parts, 142724 and 121, that added together give a triangular number (142845 = T₅₃₄).

The spelling of 142724121 in words is "one hundred forty-two million, seven hundred twenty-four thousand, one hundred twenty-one".