1121819 has 2 divisors, whose sum is σ = 1121820. Its totient is φ = 1121818.

The previous prime is 1121737. The next prime is 1121831. The reversal of 1121819 is 9181211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1121819 - 2²⁰ = 73243 is a prime.

It is a super-2 number, since 2×1121819² = 2516955737522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121794 and 1121803.

It is not a weakly prime, because it can be changed into another prime (1121839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560909 + 560910.

It is an arithmetic number, because the mean of its divisors is an integer number (560910).

2^1121819 is an apocalyptic number.

1121819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121819 is an equidigital number, since it uses as much as digits as its factorization.

1121819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 23.

The square root of 1121819 is about 1059.1595724913. The cubic root of 1121819 is about 103.9060727398.

The spelling of 1121819 in words is "one million, one hundred twenty-one thousand, eight hundred nineteen".