641407 has 4 divisors (see below), whose sum is σ = 690760. Its totient is φ = 592056.

The previous prime is 641387. The next prime is 641411. The reversal of 641407 is 704146.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 704146 = 2 ⋅352073.

It is a cyclic number.

It is not a de Polignac number, because 641407 - 2⁷ = 641279 is a prime.

It is a super-2 number, since 2×641407² = 822805879298, which contains 22 as substring.

It is a Duffinian number.

641407 is a lucky number.

It is a plaindrome in base 8.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24657 + ... + 24682.

It is an arithmetic number, because the mean of its divisors is an integer number (172690).

2⁶⁴¹⁴⁰⁷ is an apocalyptic number.

641407 is a deficient number, since it is larger than the sum of its proper divisors (49353).

641407 is a wasteful number, since it uses less digits than its factorization.

641407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49352.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 641407 is about 800.8788922178. The cubic root of 641407 is about 86.2404932461.

The spelling of 641407 in words is "six hundred forty-one thousand, four hundred seven".