1071999 has 12 divisors (see below), whose sum is σ = 1630200. Its totient is φ = 676944.

The previous prime is 1071991. The next prime is 1072009. The reversal of 1071999 is 9991701.

It is not a de Polignac number, because 1071999 - 2³ = 1071991 is a prime.

It is a super-2 number, since 2×1071999² = 2298363712002, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1071991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2964 + ... + 3305.

It is an arithmetic number, because the mean of its divisors is an integer number (135850).

2^1071999 is an apocalyptic number.

1071999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1071999 is a deficient number, since it is larger than the sum of its proper divisors (558201).

1071999 is a wasteful number, since it uses less digits than its factorization.

1071999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6294 (or 6291 counting only the distinct ones).

The product of its (nonzero) digits is 5103, while the sum is 36.

The square root of 1071999 is about 1035.3738455263. The cubic root of 1071999 is about 102.3445671147.

The spelling of 1071999 in words is "one million, seventy-one thousand, nine hundred ninety-nine".