1220910 has 16 divisors (see below), whose sum is σ = 2930256. Its totient is φ = 325568.

The previous prime is 1220903. The next prime is 1220917. The reversal of 1220910 is 190221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1220903) and next prime (1220917).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1220910.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20319 + ... + 20378.

It is an arithmetic number, because the mean of its divisors is an integer number (183141).

2^1220910 is an apocalyptic number.

1220910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220910 is an abundant number, since it is smaller than the sum of its proper divisors (1709346).

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

1220910 is a wasteful number, since it uses less digits than its factorization.

1220910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40707.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1220910 is about 1104.9479625756. The cubic root of 1220910 is about 106.8795336813.

The spelling of 1220910 in words is "one million, two hundred twenty thousand, nine hundred ten".