1277220 has 48 divisors (see below), whose sum is σ = 4088448. Its totient is φ = 291840.

The previous prime is 1277209. The next prime is 1277233. The reversal of 1277220 is 227721.

It is a super-4 number, since 4×1277220⁴ (a number of 26 digits) contains 4444 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1101 + ... + 1940.

It is an arithmetic number, because the mean of its divisors is an integer number (85176).

2^1277220 is an apocalyptic number.

1277220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1277220 is an abundant number, since it is smaller than the sum of its proper divisors (2811228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1277220 is a wasteful number, since it uses less digits than its factorization.

1277220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060 (or 3058 counting only the distinct ones).

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

The square root of 1277220 is about 1130.1415840504. The cubic root of 1277220 is about 108.4980426781.

The spelling of 1277220 in words is "one million, two hundred seventy-seven thousand, two hundred twenty".