641507 has 8 divisors (see below), whose sum is σ = 665280. Its totient is φ = 618280.

The previous prime is 641491. The next prime is 641513. The reversal of 641507 is 705146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 641507 - 2⁴ = 641491 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (643507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4832 + ... + 4962.

It is an arithmetic number, because the mean of its divisors is an integer number (83160).

2⁶⁴¹⁵⁰⁷ is an apocalyptic number.

641507 is a deficient number, since it is larger than the sum of its proper divisors (23773).

641507 is a wasteful number, since it uses less digits than its factorization.

641507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 641507 is about 800.9413211965. The cubic root of 641507 is about 86.2449748525.

The spelling of 641507 in words is "six hundred forty-one thousand, five hundred seven".