342389921 has 16 divisors (see below), whose sum is σ = 364089600. Its totient is φ = 321474048.

The previous prime is 342389869. The next prime is 342389939. The reversal of 342389921 is 129983243.

It is not a de Polignac number, because 342389921 - 2²² = 338195617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (342389941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164936 + ... + 166998.

It is an arithmetic number, because the mean of its divisors is an integer number (22755600).

Almost surely, 2^342389921 is an apocalyptic number.

It is an amenable number.

342389921 is a deficient number, since it is larger than the sum of its proper divisors (21699679).

342389921 is a wasteful number, since it uses less digits than its factorization.

342389921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2248.

The product of its digits is 93312, while the sum is 41.

The square root of 342389921 is about 18503.7812622177. The cubic root of 342389921 is about 699.5847339696.

The spelling of 342389921 in words is "three hundred forty-two million, three hundred eighty-nine thousand, nine hundred twenty-one".