1243090 has 8 divisors (see below), whose sum is σ = 2237580. Its totient is φ = 497232.

The previous prime is 1243013. The next prime is 1243093. The reversal of 1243090 is 903421.

It can be written as a sum of positive squares in 2 ways, for example, as 1168561 + 74529 = 1081^2 + 273^2 .

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 (1243093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62145 + ... + 62164.

2^1243090 is an apocalyptic number.

1243090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1243090 is a deficient number, since it is larger than the sum of its proper divisors (994490).

1243090 is a wasteful number, since it uses less digits than its factorization.

1243090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124316.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1243090 is about 1114.9394602399. The cubic root of 1243090 is about 107.5228723641.

The spelling of 1243090 in words is "one million, two hundred forty-three thousand, ninety".