142352121 has 4 divisors (see below), whose sum is σ = 189802832. Its totient is φ = 94901412.

The previous prime is 142352107. The next prime is 142352137. The reversal of 142352121 is 121253241.

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 not a de Polignac number, because 142352121 - 2¹⁴ = 142335737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142352321) 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, 23725351 + ... + 23725356.

It is an arithmetic number, because the mean of its divisors is an integer number (47450708).

Almost surely, 2^142352121 is an apocalyptic number.

It is an amenable number.

142352121 is a deficient number, since it is larger than the sum of its proper divisors (47450711).

142352121 is an equidigital number, since it uses as much as digits as its factorization.

142352121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47450710.

The product of its digits is 480, while the sum is 21.

The square root of 142352121 is about 11931.1408088246. The cubic root of 142352121 is about 522.1412214609.

The spelling of 142352121 in words is "one hundred forty-two million, three hundred fifty-two thousand, one hundred twenty-one".