1220777 has 2 divisors, whose sum is σ = 1220778. Its totient is φ = 1220776.

The previous prime is 1220773. The next prime is 1220783. The reversal of 1220777 is 7770221.

1220777 is nontrivially palindromic in base 2.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1157776 + 63001 = 1076^2 + 251^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220777 - 2² = 1220773 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610388 + 610389.

It is an arithmetic number, because the mean of its divisors is an integer number (610389).

2^1220777 is an apocalyptic number.

It is an amenable number.

1220777 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220777 is an equidigital number, since it uses as much as digits as its factorization.

1220777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1372, while the sum is 26.

The square root of 1220777 is about 1104.8877771068. The cubic root of 1220777 is about 106.8756525615.

Adding to 1220777 its reverse (7770221), we get a palindrome (8990998).

It can be divided in two parts, 12207 and 77, that multiplied together give a palindrome (939939).

The spelling of 1220777 in words is "one million, two hundred twenty thousand, seven hundred seventy-seven".