641487 has 16 divisors (see below), whose sum is σ = 1066752. Its totient is φ = 333120.

The previous prime is 641479. The next prime is 641491. The reversal of 641487 is 784146.

It is not a de Polignac number, because 641487 - 2³ = 641479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641437) 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, 1158 + ... + 1619.

It is an arithmetic number, because the mean of its divisors is an integer number (66672).

2⁶⁴¹⁴⁸⁷ is an apocalyptic number.

641487 is a deficient number, since it is larger than the sum of its proper divisors (425265).

641487 is a wasteful number, since it uses less digits than its factorization.

641487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2798.

The product of its digits is 5376, while the sum is 30.

The square root of 641487 is about 800.9288357900. The cubic root of 641487 is about 86.2440785685.

It can be divided in two parts, 641 and 487, that added together give a triangular number (1128 = T₄₇).

The spelling of 641487 in words is "six hundred forty-one thousand, four hundred eighty-seven".