1366220 has 12 divisors (see below), whose sum is σ = 2869104. Its totient is φ = 546480.

The previous prime is 1366213. The next prime is 1366241. The reversal of 1366220 is 226631.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 68311 = 1366220 / (1 + 3 + 6 + 6 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 1366192 and 1366201.

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, 34136 + ... + 34175.

It is an arithmetic number, because the mean of its divisors is an integer number (239092).

2^1366220 is an apocalyptic number.

1366220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1366220 is an abundant number, since it is smaller than the sum of its proper divisors (1502884).

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

1366220 is a wasteful number, since it uses less digits than its factorization.

1366220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68320 (or 68318 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1366220 is about 1168.8541397454. The cubic root of 1366220 is about 110.9618135561.

The spelling of 1366220 in words is "one million, three hundred sixty-six thousand, two hundred twenty".