1236220 has 24 divisors (see below), whose sum is σ = 2623824. Its totient is φ = 489216.

The previous prime is 1236211. The next prime is 1236229. The reversal of 1236220 is 226321.

It is an interprime number because it is at equal distance from previous prime (1236211) and next prime (1236229).

It is a junction number, because it is equal to n+sod(n) for n = 1236194 and 1236203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1236229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1987 + ... + 2533.

It is an arithmetic number, because the mean of its divisors is an integer number (109326).

2^1236220 is an apocalyptic number.

1236220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1236220 is an abundant number, since it is smaller than the sum of its proper divisors (1387604).

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

1236220 is a wasteful number, since it uses less digits than its factorization.

1236220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1236220 is about 1111.8543070025. The cubic root of 1236220 is about 107.3244294746.

The spelling of 1236220 in words is "one million, two hundred thirty-six thousand, two hundred twenty".