1220961 has 16 divisors (see below), whose sum is σ = 1897344. Its totient is φ = 683904.

The previous prime is 1220953. The next prime is 1220969. The reversal of 1220961 is 1690221.

It is an interprime number because it is at equal distance from previous prime (1220953) and next prime (1220969).

It is not a de Polignac number, because 1220961 - 2³ = 1220953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 15 ways as a sum of consecutive naturals, for example, 565 + ... + 1661.

It is an arithmetic number, because the mean of its divisors is an integer number (118584).

2^1220961 is an apocalyptic number.

It is an amenable number.

1220961 is a deficient number, since it is larger than the sum of its proper divisors (676383).

1220961 is a wasteful number, since it uses less digits than its factorization.

1220961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160.

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

The square root of 1220961 is about 1104.9710403445. The cubic root of 1220961 is about 106.8810218556.

The spelling of 1220961 in words is "one million, two hundred twenty thousand, nine hundred sixty-one".