641277 has 48 divisors (see below), whose sum is σ = 1223040. Its totient is φ = 326592.

The previous prime is 641261. The next prime is 641279. The reversal of 641277 is 772146.

It is not a de Polignac number, because 641277 - 2⁴ = 641261 is a prime.

It is a super-2 number, since 2×641277² = 822472381458, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

641277 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 641277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641279) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22099 + ... + 22127.

It is an arithmetic number, because the mean of its divisors is an integer number (25480).

2⁶⁴¹²⁷⁷ is an apocalyptic number.

It is an amenable number.

641277 is a deficient number, since it is larger than the sum of its proper divisors (581763).

641277 is a wasteful number, since it uses less digits than its factorization.

641277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 52 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 641277 is about 800.7977272695. The cubic root of 641277 is about 86.2346664613.

The spelling of 641277 in words is "six hundred forty-one thousand, two hundred seventy-seven".