617442 has 32 divisors (see below), whose sum is σ = 1440384. Its totient is φ = 172800.

The previous prime is 617429. The next prime is 617447. The reversal of 617442 is 244716.

617442 is nontrivially palindromic in base 15.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617447) by changing a digit.

617442 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 15 ways as a sum of consecutive naturals, for example, 2442 + ... + 2682.

It is an arithmetic number, because the mean of its divisors is an integer number (45012).

2⁶¹⁷⁴⁴² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 617442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (720192).

617442 is an abundant number, since it is smaller than the sum of its proper divisors (822942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

617442 is a wasteful number, since it uses less digits than its factorization.

617442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314.

The product of its digits is 1344, while the sum is 24.

The square root of 617442 is about 785.7747768922. The cubic root of 617442 is about 85.1527587520.

It can be divided in two parts, 6174 and 42, that added together give a triangular number (6216 = T₁₁₁).

The spelling of 617442 in words is "six hundred seventeen thousand, four hundred forty-two".