642061 has 12 divisors (see below), whose sum is σ = 765408. Its totient is φ = 527472.

The previous prime is 642049. The next prime is 642071. The reversal of 642061 is 160246.

It is not a de Polignac number, because 642061 - 2⁹ = 641549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9550 + ... + 9616.

It is an arithmetic number, because the mean of its divisors is an integer number (63784).

2⁶⁴²⁰⁶¹ is an apocalyptic number.

It is an amenable number.

642061 is a deficient number, since it is larger than the sum of its proper divisors (123347).

642061 is an equidigital number, since it uses as much as digits as its factorization.

642061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 642061 is about 801.2870896252. The cubic root of 642061 is about 86.2697945186.

The spelling of 642061 in words is "six hundred forty-two thousand, sixty-one".