1122290 has 32 divisors (see below), whose sum is σ = 2222640. Its totient is φ = 405504.

The previous prime is 1122287. The next prime is 1122367. The reversal of 1122290 is 922211.

It can be written as a sum of positive squares in 8 ways, for example, as 116281 + 1006009 = 341^2 + 1003^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11522 + ... + 11618.

2^1122290 is an apocalyptic number.

1122290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1122290 is a deficient number, since it is larger than the sum of its proper divisors (1100350).

1122290 is a wasteful number, since it uses less digits than its factorization.

1122290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1122290 is about 1059.3818952578. The cubic root of 1122290 is about 103.9206124926.

The spelling of 1122290 in words is "one million, one hundred twenty-two thousand, two hundred ninety".