642150 has 36 divisors (see below), whose sum is σ = 1726452. Its totient is φ = 171120.

The previous prime is 642149. The next prime is 642151. The reversal of 642150 is 51246.

It is a happy number.

642150 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (642149) and next prime (642151).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642151) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 264 + ... + 1163.

It is an arithmetic number, because the mean of its divisors is an integer number (47957).

2⁶⁴²¹⁵⁰ is an apocalyptic number.

642150 is an abundant number, since it is smaller than the sum of its proper divisors (1084302).

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

642150 is a wasteful number, since it uses less digits than its factorization.

642150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445 (or 1437 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 642150 is about 801.3426233516. The cubic root of 642150 is about 86.2737804623.

Adding to 642150 its reverse (51246), we get a palindrome (693396).

The spelling of 642150 in words is "six hundred forty-two thousand, one hundred fifty".