345351021 has 16 divisors (see below), whose sum is σ = 470166336. Its totient is φ = 225403776.

The previous prime is 345351001. The next prime is 345351091. The reversal of 345351021 is 120153543.

It is not a de Polignac number, because 345351021 - 2⁵ = 345350989 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 345350982 and 345351000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345351001) 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, 81081 + ... + 85233.

It is an arithmetic number, because the mean of its divisors is an integer number (29385396).

Almost surely, 2^345351021 is an apocalyptic number.

It is an amenable number.

345351021 is a deficient number, since it is larger than the sum of its proper divisors (124815315).

345351021 is a wasteful number, since it uses less digits than its factorization.

345351021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4732.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 345351021 is about 18583.6223863917. The cubic root of 345351021 is about 701.5956937659.

The spelling of 345351021 in words is "three hundred forty-five million, three hundred fifty-one thousand, twenty-one".