1222761 has 4 divisors (see below), whose sum is σ = 1630352. Its totient is φ = 815172.

The previous prime is 1222757. The next prime is 1222769. The reversal of 1222761 is 1672221.

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.

It is not a de Polignac number, because 1222761 - 2² = 1222757 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1222769) 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, 203791 + ... + 203796.

It is an arithmetic number, because the mean of its divisors is an integer number (407588).

2^1222761 is an apocalyptic number.

It is an amenable number.

1222761 is a deficient number, since it is larger than the sum of its proper divisors (407591).

1222761 is an equidigital number, since it uses as much as digits as its factorization.

1222761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407590.

The product of its digits is 336, while the sum is 21.

The square root of 1222761 is about 1105.7852413557. The cubic root of 1222761 is about 106.9335191303.

Adding to 1222761 its reverse (1672221), we get a palindrome (2894982).

The spelling of 1222761 in words is "one million, two hundred twenty-two thousand, seven hundred sixty-one".