617842 has 16 divisors (see below), whose sum is σ = 993600. Its totient is φ = 287280.

The previous prime is 617819. The next prime is 617843. The reversal of 617842 is 248716.

It is a self number, because there is not a number n which added to its sum of digits gives 617842.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2584 + ... + 2812.

It is an arithmetic number, because the mean of its divisors is an integer number (62100).

2⁶¹⁷⁸⁴² is an apocalyptic number.

617842 is a deficient number, since it is larger than the sum of its proper divisors (375758).

617842 is a wasteful number, since it uses less digits than its factorization.

617842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321.

The product of its digits is 2688, while the sum is 28.

The square root of 617842 is about 786.0292615418. The cubic root of 617842 is about 85.1711430704.

The spelling of 617842 in words is "six hundred seventeen thousand, eight hundred forty-two".