641345 has 16 divisors (see below), whose sum is σ = 834240. Its totient is φ = 471744.

The previous prime is 641327. The next prime is 641371. The reversal of 641345 is 543146.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 641345 - 2⁸ = 641089 is a prime.

It is a super-2 number, since 2×641345² = 822646818050, 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 641345.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4007 + ... + 4163.

It is an arithmetic number, because the mean of its divisors is an integer number (52140).

2⁶⁴¹³⁴⁵ is an apocalyptic number.

It is an amenable number.

641345 is a deficient number, since it is larger than the sum of its proper divisors (192895).

641345 is a wasteful number, since it uses less digits than its factorization.

641345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224.

The product of its digits is 1440, while the sum is 23.

The square root of 641345 is about 800.8401838070. The cubic root of 641345 is about 86.2377144162.

The spelling of 641345 in words is "six hundred forty-one thousand, three hundred forty-five".