612409 has 8 divisors (see below), whose sum is σ = 708480. Its totient is φ = 518496.

The previous prime is 612407. The next prime is 612439. The reversal of 612409 is 904216.

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 612409 - 2¹ = 612407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 612409.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612401) 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, 132 + ... + 1114.

It is an arithmetic number, because the mean of its divisors is an integer number (88560).

2⁶¹²⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

612409 is a deficient number, since it is larger than the sum of its proper divisors (96071).

612409 is an equidigital number, since it uses as much as digits as its factorization.

612409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 612409 is about 782.5656521979. The cubic root of 612409 is about 84.9207565961.

The spelling of 612409 in words is "six hundred twelve thousand, four hundred nine".