345825621 has 12 divisors (see below), whose sum is σ = 500086080. Its totient is φ = 230291880.

The previous prime is 345825619. The next prime is 345825629. The reversal of 345825621 is 126528543.

345825621 is a `hidden beast` number, since 3 + 4 + 5 + 8 + 25 + 621 = 666.

It is not a de Polignac number, because 345825621 - 2¹ = 345825619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345825629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12891 + ... + 29288.

It is an arithmetic number, because the mean of its divisors is an integer number (41673840).

Almost surely, 2^345825621 is an apocalyptic number.

It is an amenable number.

345825621 is a deficient number, since it is larger than the sum of its proper divisors (154260459).

345825621 is a wasteful number, since it uses less digits than its factorization.

345825621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43096 (or 43093 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 345825621 is about 18596.3873104429. The cubic root of 345825621 is about 701.9169368689.

The spelling of 345825621 in words is "three hundred forty-five million, eight hundred twenty-five thousand, six hundred twenty-one".