642941 has 12 divisors (see below), whose sum is σ = 736092. Its totient is φ = 558144.

The previous prime is 642937. The next prime is 642947. The reversal of 642941 is 149246.

642941 = 68³ + 69³.

It can be written as a sum of positive squares in 2 ways, for example, as 225625 + 417316 = 475^2 + 646^2 .

It is not a de Polignac number, because 642941 - 2² = 642937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 642941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642947) 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, 4625 + ... + 4761.

It is an arithmetic number, because the mean of its divisors is an integer number (61341).

2⁶⁴²⁹⁴¹ is an apocalyptic number.

It is an amenable number.

642941 is a deficient number, since it is larger than the sum of its proper divisors (93151).

642941 is a wasteful number, since it uses less digits than its factorization.

642941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188 (or 169 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 642941 is about 801.8360181483. The cubic root of 642941 is about 86.3091899248.

The spelling of 642941 in words is "six hundred forty-two thousand, nine hundred forty-one".