1226840 has 16 divisors (see below), whose sum is σ = 2760480. Its totient is φ = 490720.

The previous prime is 1226831. The next prime is 1226851. The reversal of 1226840 is 486221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15296 + ... + 15375.

It is an arithmetic number, because the mean of its divisors is an integer number (172530).

2^1226840 is an apocalyptic number.

1226840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1226840 is an abundant number, since it is smaller than the sum of its proper divisors (1533640).

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

1226840 is a wasteful number, since it uses less digits than its factorization.

1226840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30682 (or 30678 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 1226840 is about 1107.6280964295. The cubic root of 1226840 is about 107.0522934186.

The spelling of 1226840 in words is "one million, two hundred twenty-six thousand, eight hundred forty".