342509421 has 16 divisors (see below), whose sum is σ = 499143168. Its totient is φ = 207974400.

The previous prime is 342509411. The next prime is 342509423. The reversal of 342509421 is 124905243.

It is not a de Polignac number, because 342509421 - 2⁹ = 342508909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (342509423) 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, 106740 + ... + 109901.

It is an arithmetic number, because the mean of its divisors is an integer number (31196448).

Almost surely, 2^342509421 is an apocalyptic number.

342509421 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

342509421 is a deficient number, since it is larger than the sum of its proper divisors (156633747).

342509421 is a wasteful number, since it uses less digits than its factorization.

342509421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216692.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 342509421 is about 18507.0100502485. The cubic root of 342509421 is about 699.6661135571. Note that the first 3 decimals are identical.

The spelling of 342509421 in words is "three hundred forty-two million, five hundred nine thousand, four hundred twenty-one".