1122390 has 32 divisors (see below), whose sum is σ = 2993760. Its totient is φ = 299232.

The previous prime is 1122389. The next prime is 1122397. The reversal of 1122390 is 932211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1809 + ... + 2348.

It is an arithmetic number, because the mean of its divisors is an integer number (93555).

2^1122390 is an apocalyptic number.

1122390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1122390 is an abundant number, since it is smaller than the sum of its proper divisors (1871370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1122390 is a wasteful number, since it uses less digits than its factorization.

1122390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4173 (or 4167 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1122390 is about 1059.4290915394. The cubic root of 1122390 is about 103.9236989653.

It can be divided in two parts, 1122 and 390, that multiplied together give a triangular number (437580 = T₉₃₅).

The spelling of 1122390 in words is "one million, one hundred twenty-two thousand, three hundred ninety".