642250 has 32 divisors (see below), whose sum is σ = 1377792. Its totient is φ = 219600.

The previous prime is 642247. The next prime is 642253. The reversal of 642250 is 52246.

642250 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 (642247) and next prime (642253).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1567 + ... + 1933.

It is an arithmetic number, because the mean of its divisors is an integer number (43056).

2⁶⁴²²⁵⁰ is an apocalyptic number.

642250 is an abundant number, since it is smaller than the sum of its proper divisors (735542).

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

642250 is a wasteful number, since it uses less digits than its factorization.

642250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391 (or 381 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 642250 is about 801.4050162059. The cubic root of 642250 is about 86.2782586113.

Adding to 642250 its reverse (52246), we get a palindrome (694496).

The spelling of 642250 in words is "six hundred forty-two thousand, two hundred fifty".