342000021 has 8 divisors (see below), whose sum is σ = 497454624. Its totient is φ = 207272720.

The previous prime is 342000013. The next prime is 342000023. The reversal of 342000021 is 120000243.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 342000021 - 2³ = 342000013 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 341999970 and 342000006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (342000023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5181786 + ... + 5181851.

It is an arithmetic number, because the mean of its divisors is an integer number (62181828).

Almost surely, 2^342000021 is an apocalyptic number.

It is an amenable number.

342000021 is a deficient number, since it is larger than the sum of its proper divisors (155454603).

342000021 is a wasteful number, since it uses less digits than its factorization.

342000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10363651.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 342000021 is about 18493.2425766819. The cubic root of 342000021 is about 699.3190800316.

Adding to 342000021 its reverse (120000243), we get a palindrome (462000264).

It can be divided in two parts, 3 and 42000021, that added together give a palindrome (42000024).

The spelling of 342000021 in words is "three hundred forty-two million, twenty-one", and thus it is an aban number.