345385257 has 16 divisors (see below), whose sum is σ = 526955520. Its totient is φ = 197117712.

The previous prime is 345385223. The next prime is 345385283. The reversal of 345385257 is 752583543.

It is a happy number.

It is not a de Polignac number, because 345385257 - 2¹² = 345381161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (345385217) 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, 7818 + ... + 27420.

It is an arithmetic number, because the mean of its divisors is an integer number (32934720).

Almost surely, 2^345385257 is an apocalyptic number.

It is an amenable number.

345385257 is a deficient number, since it is larger than the sum of its proper divisors (181570263).

345385257 is a wasteful number, since it uses less digits than its factorization.

345385257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20452.

The product of its digits is 504000, while the sum is 42.

The square root of 345385257 is about 18584.5434972183. The cubic root of 345385257 is about 701.6188769767.

The spelling of 345385257 in words is "three hundred forty-five million, three hundred eighty-five thousand, two hundred fifty-seven".