142998921 has 24 divisors (see below), whose sum is σ = 234153920. Its totient is φ = 83366496.

The previous prime is 142998871. The next prime is 142998941. The reversal of 142998921 is 129899241.

142998921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 142998921 - 2⁹ = 142998409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142998941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29941 + ... + 34386.

Almost surely, 2^142998921 is an apocalyptic number.

It is an amenable number.

142998921 is a deficient number, since it is larger than the sum of its proper divisors (91154999).

142998921 is a wasteful number, since it uses less digits than its factorization.

142998921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64365 (or 64362 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 142998921 is about 11958.2156277599. The cubic root of 142998921 is about 522.9308379187.

It can be divided in two parts, 14299 and 8921, that added together give a triangular number (23220 = T₂₁₅).

The spelling of 142998921 in words is "one hundred forty-two million, nine hundred ninety-eight thousand, nine hundred twenty-one".