345321261 has 24 divisors (see below), whose sum is σ = 515715200. Its totient is φ = 222518016.

The previous prime is 345321239. The next prime is 345321269. The reversal of 345321261 is 162123543.

345321261 is a `hidden beast` number, since 3 + 4 + 532 + 126 + 1 = 666.

It is not a de Polignac number, because 345321261 - 2¹¹ = 345319213 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 (345321269) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32940 + ... + 42138.

Almost surely, 2^345321261 is an apocalyptic number.

It is an amenable number.

345321261 is a deficient number, since it is larger than the sum of its proper divisors (170393939).

345321261 is a wasteful number, since it uses less digits than its factorization.

345321261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9345 (or 9342 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 345321261 is about 18582.8216641069. The cubic root of 345321261 is about 701.5755402735.

The spelling of 345321261 in words is "three hundred forty-five million, three hundred twenty-one thousand, two hundred sixty-one".