1224390 has 16 divisors (see below), whose sum is σ = 2938608. Its totient is φ = 326496.

The previous prime is 1224389. The next prime is 1224403. The reversal of 1224390 is 934221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20377 + ... + 20436.

It is an arithmetic number, because the mean of its divisors is an integer number (183663).

2^1224390 is an apocalyptic number.

1224390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1224390 is an abundant number, since it is smaller than the sum of its proper divisors (1714218).

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

1224390 is a wasteful number, since it uses less digits than its factorization.

1224390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40823.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1224390 is about 1106.5215768344. The cubic root of 1224390 is about 106.9809847713.

It can be divided in two parts, 12243 and 90, that multiplied together give a triangular number (1101870 = T₁₄₈₄).

The spelling of 1224390 in words is "one million, two hundred twenty-four thousand, three hundred ninety".