641481 has 4 divisors (see below), whose sum is σ = 855312. Its totient is φ = 427652.

The previous prime is 641479. The next prime is 641491. The reversal of 641481 is 184146.

641481 is nontrivially palindromic in base 16.

641481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 641481 - 2¹ = 641479 is a prime.

It is a super-2 number, since 2×641481² = 822995746722, which contains 22 as substring.

It is a D-number.

641481 is an undulating number in base 16.

It is not an unprimeable number, because it can be changed into a prime (641411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106911 + ... + 106916.

It is an arithmetic number, because the mean of its divisors is an integer number (213828).

2⁶⁴¹⁴⁸¹ is an apocalyptic number.

It is an amenable number.

641481 is a deficient number, since it is larger than the sum of its proper divisors (213831).

641481 is a wasteful number, since it uses less digits than its factorization.

641481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213830.

The product of its digits is 768, while the sum is 24.

The square root of 641481 is about 800.9250901302. The cubic root of 641481 is about 86.2438096796.

The spelling of 641481 in words is "six hundred forty-one thousand, four hundred eighty-one".