1220969 has 2 divisors, whose sum is σ = 1220970. Its totient is φ = 1220968.

The previous prime is 1220953. The next prime is 1220981. The reversal of 1220969 is 9690221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 714025 + 506944 = 845^2 + 712^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220969 - 2⁴ = 1220953 is a prime.

It is a super-2 number, since 2×1220969² = 2981530597922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1220369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610484 + 610485.

It is an arithmetic number, because the mean of its divisors is an integer number (610485).

2^1220969 is an apocalyptic number.

It is an amenable number.

1220969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220969 is an equidigital number, since it uses as much as digits as its factorization.

1220969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 1220969 is about 1104.9746603429. The cubic root of 1220969 is about 106.8812552909.

The spelling of 1220969 in words is "one million, two hundred twenty thousand, nine hundred sixty-nine".