1121290 has 8 divisors (see below), whose sum is σ = 2018340. Its totient is φ = 448512.

The previous prime is 1121261. The next prime is 1121293. The reversal of 1121290 is 921211.

It can be written as a sum of positive squares in 2 ways, for example, as 938961 + 182329 = 969^2 + 427^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1121293) 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 3 ways as a sum of consecutive naturals, for example, 56055 + ... + 56074.

2^1121290 is an apocalyptic number.

1121290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1121290 is a deficient number, since it is larger than the sum of its proper divisors (897050).

1121290 is a wasteful number, since it uses less digits than its factorization.

1121290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112136.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 1121290 is about 1058.9098167455. The cubic root of 1121290 is about 103.8897376761.

The spelling of 1121290 in words is "one million, one hundred twenty-one thousand, two hundred ninety".