345021261 has 16 divisors (see below), whose sum is σ = 495988416. Its totient is φ = 212075136.

The previous prime is 345021253. The next prime is 345021277. The reversal of 345021261 is 162120543.

It is not a de Polignac number, because 345021261 - 2³ = 345021253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345021221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32526 + ... + 41808.

It is an arithmetic number, because the mean of its divisors is an integer number (30999276).

Almost surely, 2^345021261 is an apocalyptic number.

It is an amenable number.

345021261 is a deficient number, since it is larger than the sum of its proper divisors (150967155).

345021261 is a wasteful number, since it uses less digits than its factorization.

345021261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10252.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 345021261 is about 18574.7479390704. The cubic root of 345021261 is about 701.3723153685.

The spelling of 345021261 in words is "three hundred forty-five million, twenty-one thousand, two hundred sixty-one".