1213850 has 24 divisors (see below), whose sum is σ = 2464128. Its totient is φ = 441200.

The previous prime is 1213841. The next prime is 1213873. The reversal of 1213850 is 583121.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 554 + ... + 1653.

It is an arithmetic number, because the mean of its divisors is an integer number (102672).

2^1213850 is an apocalyptic number.

1213850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213850 is an abundant number, since it is smaller than the sum of its proper divisors (1250278).

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

1213850 is a wasteful number, since it uses less digits than its factorization.

1213850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2230 (or 2225 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1213850 is about 1101.7486101648. The cubic root of 1213850 is about 106.6731224391.

Adding to 1213850 its reverse (583121), we get a palindrome (1796971).

The spelling of 1213850 in words is "one million, two hundred thirteen thousand, eight hundred fifty".