1121399 has 4 divisors (see below), whose sum is σ = 1180440. Its totient is φ = 1062360.

The previous prime is 1121389. The next prime is 1121423. The reversal of 1121399 is 9931211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9931211 = 269 ⋅36919.

It is a cyclic number.

It is not a de Polignac number, because 1121399 - 2⁴ = 1121383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29492 + ... + 29529.

It is an arithmetic number, because the mean of its divisors is an integer number (295110).

2^1121399 is an apocalyptic number.

1121399 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1121399 is a deficient number, since it is larger than the sum of its proper divisors (59041).

1121399 is an equidigital number, since it uses as much as digits as its factorization.

1121399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59040.

The product of its digits is 486, while the sum is 26.

The square root of 1121399 is about 1058.9612835227. The cubic root of 1121399 is about 103.8931039222.

The spelling of 1121399 in words is "one million, one hundred twenty-one thousand, three hundred ninety-nine".