345246921 has 16 divisors (see below), whose sum is σ = 512675520. Its totient is φ = 229625280.

The previous prime is 345246901. The next prime is 345246961. The reversal of 345246921 is 129642543.

It is a happy number.

It is not a de Polignac number, because 345246921 - 2⁷ = 345246793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (345246901) 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, 3075 + ... + 26456.

It is an arithmetic number, because the mean of its divisors is an integer number (32042220).

Almost surely, 2^345246921 is an apocalyptic number.

It is an amenable number.

345246921 is a deficient number, since it is larger than the sum of its proper divisors (167428599).

345246921 is a wasteful number, since it uses less digits than its factorization.

345246921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29973 (or 29967 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 345246921 is about 18580.8213219976. The cubic root of 345246921 is about 701.5251921150.

The spelling of 345246921 in words is "three hundred forty-five million, two hundred forty-six thousand, nine hundred twenty-one".