641512 has 32 divisors (see below), whose sum is σ = 1312200. Its totient is φ = 292864.

The previous prime is 641491. The next prime is 641513. The reversal of 641512 is 215146.

641512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 586756 + 54756 = 766^2 + 234^2 .

It is a super-2 number, since 2×641512² = 823075292288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641512.

It is not an unprimeable number, because it can be changed into a prime (641513) 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, 7164 + ... + 7252.

2⁶⁴¹⁵¹² is an apocalyptic number.

It is an amenable number.

641512 is an abundant number, since it is smaller than the sum of its proper divisors (670688).

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

641512 is a wasteful number, since it uses less digits than its factorization.

641512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 161 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 641512 is about 800.9444425177. The cubic root of 641512 is about 86.2451989206.

Adding to 641512 its reverse (215146), we get a palindrome (856658).

The spelling of 641512 in words is "six hundred forty-one thousand, five hundred twelve".