616642 has 16 divisors (see below), whose sum is σ = 1024632. Its totient is φ = 276480.

The previous prime is 616639. The next prime is 616643. The reversal of 616642 is 246616.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 606841 + 9801 = 779^2 + 99^2 .

It is not an unprimeable number, because it can be changed into a prime (616643) 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, 642 + ... + 1282.

2⁶¹⁶⁶⁴² is an apocalyptic number.

616642 is a deficient number, since it is larger than the sum of its proper divisors (407990).

616642 is a wasteful number, since it uses less digits than its factorization.

616642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693.

The product of its digits is 1728, while the sum is 25.

The square root of 616642 is about 785.2655601769. The cubic root of 616642 is about 85.1159662817.

The spelling of 616642 in words is "six hundred sixteen thousand, six hundred forty-two".