1213390 has 16 divisors (see below), whose sum is σ = 2216160. Its totient is φ = 478240.

The previous prime is 1213379. The next prime is 1213427. The reversal of 1213390 is 933121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145 + ... + 1564.

It is an arithmetic number, because the mean of its divisors is an integer number (138510).

2^1213390 is an apocalyptic number.

1213390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213390 is a deficient number, since it is larger than the sum of its proper divisors (1002770).

1213390 is a wasteful number, since it uses less digits than its factorization.

1213390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1787.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 1213390 is about 1101.5398313270. The cubic root of 1213390 is about 106.6596458053.

The spelling of 1213390 in words is "one million, two hundred thirteen thousand, three hundred ninety".