1220963 has 4 divisors (see below), whose sum is σ = 1254000. Its totient is φ = 1187928.

The previous prime is 1220953. The next prime is 1220969. The reversal of 1220963 is 3690221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3690221 = 29 ⋅127249.

It is a cyclic number.

It is not a de Polignac number, because 1220963 - 2¹² = 1216867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220969) 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, 16463 + ... + 16536.

It is an arithmetic number, because the mean of its divisors is an integer number (313500).

2^1220963 is an apocalyptic number.

1220963 is a deficient number, since it is larger than the sum of its proper divisors (33037).

1220963 is an equidigital number, since it uses as much as digits as its factorization.

1220963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33036.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1220963 is about 1104.9719453452. The cubic root of 1220963 is about 106.8810802145.

The spelling of 1220963 in words is "one million, two hundred twenty thousand, nine hundred sixty-three".