641290 has 16 divisors (see below), whose sum is σ = 1243368. Its totient is φ = 236736.

The previous prime is 641287. The next prime is 641299. The reversal of 641290 is 92146.

It can be written as a sum of positive squares in 4 ways, for example, as 339889 + 301401 = 583^2 + 549^2 .

It is a super-2 number, since 2×641290² = 822505728200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641299) 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, 2337 + ... + 2596.

2⁶⁴¹²⁹⁰ is an apocalyptic number.

641290 is a deficient number, since it is larger than the sum of its proper divisors (602078).

641290 is a wasteful number, since it uses less digits than its factorization.

641290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4953.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 641290 is about 800.8058441345. The cubic root of 641290 is about 86.2352491752.

The spelling of 641290 in words is "six hundred forty-one thousand, two hundred ninety".