1220190 has 32 divisors (see below), whose sum is σ = 2967840. Its totient is φ = 321024.

The previous prime is 1220171. The next prime is 1220203. The reversal of 1220190 is 910221.

1220190 = 492² + 493² + ... + 496².

It is a happy number.

It is a super-2 number, since 2×1220190² = 2977727272200, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2442 + ... + 2898.

It is an arithmetic number, because the mean of its divisors is an integer number (92745).

2^1220190 is an apocalyptic number.

1220190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220190 is an abundant number, since it is smaller than the sum of its proper divisors (1747650).

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

1220190 is a wasteful number, since it uses less digits than its factorization.

1220190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556.

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

The square root of 1220190 is about 1104.6221073290. The cubic root of 1220190 is about 106.8585197392.

It can be divided in two parts, 12 and 20190, that added together give a palindrome (20202).

The spelling of 1220190 in words is "one million, two hundred twenty thousand, one hundred ninety".