199545 has 16 divisors (see below), whose sum is σ = 326592. Its totient is φ = 104000.

The previous prime is 199523. The next prime is 199559. The reversal of 199545 is 545991.

199545 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 199545 - 2⁷ = 199417 is a prime.

199545 is strictly pandigital in base 7.

It is a congruent number.

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, 670 + ... + 920.

It is an arithmetic number, because the mean of its divisors is an integer number (20412).

2¹⁹⁹⁵⁴⁵ is an apocalyptic number.

199545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

199545 is a deficient number, since it is larger than the sum of its proper divisors (127047).

199545 is a wasteful number, since it uses less digits than its factorization.

199545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312.

The product of its digits is 8100, while the sum is 33.

The square root of 199545 is about 446.7046003793. The cubic root of 199545 is about 58.4359734891.

The spelling of 199545 in words is "one hundred ninety-nine thousand, five hundred forty-five".