342015021 has 8 divisors (see below), whose sum is σ = 506688960. Its totient is φ = 228009996.

The previous prime is 342015017. The next prime is 342015031. The reversal of 342015021 is 120510243.

It is not a de Polignac number, because 342015021 - 2² = 342015017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 342014985 and 342015003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (342015031) 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, 6333585 + ... + 6333638.

It is an arithmetic number, because the mean of its divisors is an integer number (63336120).

Almost surely, 2^342015021 is an apocalyptic number.

It is an amenable number.

342015021 is a deficient number, since it is larger than the sum of its proper divisors (164673939).

342015021 is a wasteful number, since it uses less digits than its factorization.

342015021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12667232 (or 12667226 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 342015021 is about 18493.6481257755. The cubic root of 342015021 is about 699.3293038447.

Adding to 342015021 its reverse (120510243), we get a palindrome (462525264).

The spelling of 342015021 in words is "three hundred forty-two million, fifteen thousand, twenty-one".