342021505 has 32 divisors (see below), whose sum is σ = 487837440. Its totient is φ = 225227520.

The previous prime is 342021497. The next prime is 342021509. The reversal of 342021505 is 505120243.

It is not a de Polignac number, because 342021505 - 2³ = 342021497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (342021509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 213367 + ... + 214963.

It is an arithmetic number, because the mean of its divisors is an integer number (15244920).

Almost surely, 2^342021505 is an apocalyptic number.

342021505 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

342021505 is a deficient number, since it is larger than the sum of its proper divisors (145815935).

342021505 is a wasteful number, since it uses less digits than its factorization.

342021505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 342021505 is about 18493.8234283774. The cubic root of 342021505 is about 699.3337231658. Note that the first 3 decimals are identical.

Adding to 342021505 its reverse (505120243), we get a palindrome (847141748).

The spelling of 342021505 in words is "three hundred forty-two million, twenty-one thousand, five hundred five".