1220169 has 8 divisors (see below), whose sum is σ = 1636992. Its totient is φ = 808400.

The previous prime is 1220147. The next prime is 1220171. The reversal of 1220169 is 9610221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220169 - 2⁷ = 1220041 is a prime.

It is a super-2 number, since 2×1220169² = 2977624777122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220369) 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, 657 + ... + 1694.

It is an arithmetic number, because the mean of its divisors is an integer number (204624).

2^1220169 is an apocalyptic number.

It is an amenable number.

1220169 is a deficient number, since it is larger than the sum of its proper divisors (416823).

1220169 is a wasteful number, since it uses less digits than its factorization.

1220169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2527.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1220169 is about 1104.6126017749. The cubic root of 1220169 is about 106.8579067085.

The spelling of 1220169 in words is "one million, two hundred twenty thousand, one hundred sixty-nine".