1122999 has 4 divisors (see below), whose sum is σ = 1497336. Its totient is φ = 748664.

The previous prime is 1122997. The next prime is 1123051. The reversal of 1122999 is 9992211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1122999 - 2¹ = 1122997 is a prime.

It is a super-2 number, since 2×1122999² = 2522253508002, which contains 22 as substring.

It is a D-number.

1122999 is a lucky number.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187164 + ... + 187169.

It is an arithmetic number, because the mean of its divisors is an integer number (374334).

2^1122999 is an apocalyptic number.

1122999 is a deficient number, since it is larger than the sum of its proper divisors (374337).

1122999 is an equidigital number, since it uses as much as digits as its factorization.

1122999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374336.

The product of its digits is 2916, while the sum is 33.

The square root of 1122999 is about 1059.7164715149. The cubic root of 1122999 is about 103.9424916278.

The spelling of 1122999 in words is "one million, one hundred twenty-two thousand, nine hundred ninety-nine".