864541 has 2 divisors, whose sum is σ = 864542. Its totient is φ = 864540.

The previous prime is 864533. The next prime is 864551. The reversal of 864541 is 145468.

864541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 556516 + 308025 = 746^2 + 555^2 .

It is a cyclic number.

It is not a de Polignac number, because 864541 - 2³ = 864533 is a prime.

It is a super-2 number, since 2×864541² = 1494862281362, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432270 + 432271.

It is an arithmetic number, because the mean of its divisors is an integer number (432271).

2⁸⁶⁴⁵⁴¹ is an apocalyptic number.

It is an amenable number.

864541 is a deficient number, since it is larger than the sum of its proper divisors (1).

864541 is an equidigital number, since it uses as much as digits as its factorization.

864541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 28.

The square root of 864541 is about 929.8069692146. The cubic root of 864541 is about 95.2639382289.

The spelling of 864541 in words is "eight hundred sixty-four thousand, five hundred forty-one".