1199913 has 16 divisors (see below), whose sum is σ = 1880256. Its totient is φ = 671040.

The previous prime is 1199909. The next prime is 1199923. The reversal of 1199913 is 3199911.

It is not a de Polignac number, because 1199913 - 2² = 1199909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1199923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 970 + ... + 1827.

It is an arithmetic number, because the mean of its divisors is an integer number (117516).

2^1199913 is an apocalyptic number.

1199913 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1199913 is a deficient number, since it is larger than the sum of its proper divisors (680343).

1199913 is a wasteful number, since it uses less digits than its factorization.

1199913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2824.

The product of its digits is 2187, while the sum is 33.

The square root of 1199913 is about 1095.4054044051. The cubic root of 1199913 is about 106.2632887647.

It can be divided in two parts, 1199 and 913, that added together give a palindrome (2112).

The spelling of 1199913 in words is "one million, one hundred ninety-nine thousand, nine hundred thirteen".