1222081 has 4 divisors (see below), whose sum is σ = 1396672. Its totient is φ = 1047492.

The previous prime is 1222063. The next prime is 1222097. The reversal of 1222081 is 1802221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1802221 = 17 ⋅106013.

It is a cyclic number.

It is not a de Polignac number, because 1222081 - 2⁵ = 1222049 is a prime.

It is a super-2 number, since 2×1222081² = 2986963941122, which contains 22 as substring.

It is a Duffinian number.

1222081 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87285 + ... + 87298.

It is an arithmetic number, because the mean of its divisors is an integer number (349168).

2^1222081 is an apocalyptic number.

It is an amenable number.

1222081 is a deficient number, since it is larger than the sum of its proper divisors (174591).

1222081 is an equidigital number, since it uses as much as digits as its factorization.

1222081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174590.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1222081 is about 1105.4777247869. The cubic root of 1222081 is about 106.9136928856.

The spelling of 1222081 in words is "one million, two hundred twenty-two thousand, eighty-one".