1220277 has 16 divisors (see below), whose sum is σ = 1752192. Its totient is φ = 752640.

The previous prime is 1220257. The next prime is 1220309. The reversal of 1220277 is 7720221.

It is not a de Polignac number, because 1220277 - 2¹⁴ = 1203893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220257) 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, 3453 + ... + 3789.

It is an arithmetic number, because the mean of its divisors is an integer number (109512).

2^1220277 is an apocalyptic number.

1220277 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1220277 is a deficient number, since it is larger than the sum of its proper divisors (531915).

1220277 is a wasteful number, since it uses less digits than its factorization.

1220277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 1220277 is about 1104.6614866103. The cubic root of 1220277 is about 106.8610593629.

Adding to 1220277 its reverse (7720221), we get a palindrome (8940498).

The spelling of 1220277 in words is "one million, two hundred twenty thousand, two hundred seventy-seven".