1220994 has 20 divisors (see below), whose sum is σ = 2736294. Its totient is φ = 406944.

The previous prime is 1220993. The next prime is 1221019. The reversal of 1220994 is 4990221.

It can be written as a sum of positive squares in only one way, i.e., 1071225 + 149769 = 1035^2 + 387^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3607 + ... + 3930.

2^1220994 is an apocalyptic number.

1220994 is an abundant number, since it is smaller than the sum of its proper divisors (1515300).

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

1220994 is an equidigital number, since it uses as much as digits as its factorization.

1220994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7551 (or 7542 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1220994 is about 1104.9859727616. The cubic root of 1220994 is about 106.8819847697.

The spelling of 1220994 in words is "one million, two hundred twenty thousand, nine hundred ninety-four".