342140421 has 16 divisors (see below), whose sum is σ = 524275200. Its totient is φ = 194414448.

The previous prime is 342140417. The next prime is 342140431. The reversal of 342140421 is 124041243.

It is not a de Polignac number, because 342140421 - 2² = 342140417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (342140431) 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 15 ways as a sum of consecutive naturals, for example, 41751 + ... + 49268.

It is an arithmetic number, because the mean of its divisors is an integer number (32767200).

Almost surely, 2^342140421 is an apocalyptic number.

It is an amenable number.

342140421 is a deficient number, since it is larger than the sum of its proper divisors (182134779).

342140421 is a wasteful number, since it uses less digits than its factorization.

342140421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91208.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 342140421 is about 18497.0381683122. The cubic root of 342140421 is about 699.4147632286.

Adding to 342140421 its reverse (124041243), we get a palindrome (466181664).

The spelling of 342140421 in words is "three hundred forty-two million, one hundred forty thousand, four hundred twenty-one".