345287 has 8 divisors (see below), whose sum is σ = 385200. Its totient is φ = 307584.

The previous prime is 345271. The next prime is 345307. The reversal of 345287 is 782543.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 345287 - 2⁴ = 345271 is a prime.

It is a super-2 number, since 2×345287² = 238446224738, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 345287.

It is not an unprimeable number, because it can be changed into a prime (345227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212 + ... + 857.

It is an arithmetic number, because the mean of its divisors is an integer number (48150).

2³⁴⁵²⁸⁷ is an apocalyptic number.

345287 is a deficient number, since it is larger than the sum of its proper divisors (39913).

345287 is a wasteful number, since it uses less digits than its factorization.

345287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105.

The product of its digits is 6720, while the sum is 29.

The square root of 345287 is about 587.6112660595. The cubic root of 345287 is about 70.1552337267.

The spelling of 345287 in words is "three hundred forty-five thousand, two hundred eighty-seven".