999541 has 2 divisors, whose sum is σ = 999542. Its totient is φ = 999540.

The previous prime is 999529. The next prime is 999553. The reversal of 999541 is 145999.

999541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (999529) and next prime (999553).

It can be written as a sum of positive squares in only one way, i.e., 874225 + 125316 = 935^2 + 354^2 .

It is a cyclic number.

It is not a de Polignac number, because 999541 - 2⁹ = 999029 is a prime.

999541 is a lucky number.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 999541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499770 + 499771.

It is an arithmetic number, because the mean of its divisors is an integer number (499771).

2⁹⁹⁹⁵⁴¹ is an apocalyptic number.

It is an amenable number.

999541 is a deficient number, since it is larger than the sum of its proper divisors (1).

999541 is an equidigital number, since it uses as much as digits as its factorization.

999541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14580, while the sum is 37.

The square root of 999541 is about 999.7704736588. The cubic root of 999541 is about 99.9846976585.

It can be divided in two parts, 999 and 541, that added together give a triangular number (1540 = T₅₅).

The spelling of 999541 in words is "nine hundred ninety-nine thousand, five hundred forty-one".