641286 has 24 divisors (see below), whose sum is σ = 1450800. Its totient is φ = 204336.

The previous prime is 641279. The next prime is 641287. The reversal of 641286 is 682146.

It is a super-2 number, since 2×641286² = 822495467592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641287) 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, 361 + ... + 1188.

It is an arithmetic number, because the mean of its divisors is an integer number (60450).

2⁶⁴¹²⁸⁶ is an apocalyptic number.

641286 is an abundant number, since it is smaller than the sum of its proper divisors (809514).

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

641286 is a wasteful number, since it uses less digits than its factorization.

641286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580 (or 1577 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 641286 is about 800.8033466464. The cubic root of 641286 is about 86.2350698795.

The spelling of 641286 in words is "six hundred forty-one thousand, two hundred eighty-six".