617242 has 4 divisors (see below), whose sum is σ = 925866. Its totient is φ = 308620.

The previous prime is 617237. The next prime is 617249. The reversal of 617242 is 242716.

617242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 594441 + 22801 = 771^2 + 151^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (617249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154309 + ... + 154312.

2⁶¹⁷²⁴² is an apocalyptic number.

617242 is a deficient number, since it is larger than the sum of its proper divisors (308624).

617242 is a wasteful number, since it uses less digits than its factorization.

617242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308623.

The product of its digits is 672, while the sum is 22.

The square root of 617242 is about 785.6475036554. The cubic root of 617242 is about 85.1435636153.

Adding to 617242 its reverse (242716), we get a palindrome (859958).

The spelling of 617242 in words is "six hundred seventeen thousand, two hundred forty-two".