345046021 has 4 divisors (see below), whose sum is σ = 345157344. Its totient is φ = 344934700.

The previous prime is 345046019. The next prime is 345046033. The reversal of 345046021 is 120640543.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120640543 = 23 ⋅5245241.

It is a cyclic number.

It is not a de Polignac number, because 345046021 - 2¹ = 345046019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345046421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50875 + ... + 57256.

It is an arithmetic number, because the mean of its divisors is an integer number (86289336).

Almost surely, 2^345046021 is an apocalyptic number.

It is an amenable number.

345046021 is a deficient number, since it is larger than the sum of its proper divisors (111323).

345046021 is a wasteful number, since it uses less digits than its factorization.

345046021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111322.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 345046021 is about 18575.4144233716. The cubic root of 345046021 is about 701.3890926564.

Adding to 345046021 its reverse (120640543), we get a palindrome (465686564).

The spelling of 345046021 in words is "three hundred forty-five million, forty-six thousand, twenty-one".