1213860 has 24 divisors (see below), whose sum is σ = 3398976. Its totient is φ = 323680.

The previous prime is 1213841. The next prime is 1213873. The reversal of 1213860 is 683121.

It is a plaindrome in base 13.

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, 10056 + ... + 10175.

It is an arithmetic number, because the mean of its divisors is an integer number (141624).

2^1213860 is an apocalyptic number.

1213860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213860 is an abundant number, since it is smaller than the sum of its proper divisors (2185116).

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

1213860 is a wasteful number, since it uses less digits than its factorization.

1213860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20243 (or 20241 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1213860 is about 1101.7531483958. The cubic root of 1213860 is about 106.6734153716.

Adding to 1213860 its reverse (683121), we get a palindrome (1896981).

The spelling of 1213860 in words is "one million, two hundred thirteen thousand, eight hundred sixty".