612345 has 8 divisors (see below), whose sum is σ = 979776. Its totient is φ = 326576.

The previous prime is 612341. The next prime is 612349. The reversal of 612345 is 543216.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (612341) and next prime (612349).

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 612345 - 2² = 612341 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (612341) 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 7 ways as a sum of consecutive naturals, for example, 20397 + ... + 20426.

It is an arithmetic number, because the mean of its divisors is an integer number (122472).

2⁶¹²³⁴⁵ is an apocalyptic number.

It is an amenable number.

612345 is a deficient number, since it is larger than the sum of its proper divisors (367431).

612345 is a wasteful number, since it uses less digits than its factorization.

612345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40831.

The product of its digits is 720, while the sum is 21.

The square root of 612345 is about 782.5247599917. The cubic root of 612345 is about 84.9177982694.

The spelling of 612345 in words is "six hundred twelve thousand, three hundred forty-five".