1977255 has 24 divisors (see below), whose sum is σ = 3917472. Its totient is φ = 903744.

The previous prime is 1977251. The next prime is 1977259. The reversal of 1977255 is 5527791.

It is an interprime number because it is at equal distance from previous prime (1977251) and next prime (1977259).

It is not a de Polignac number, because 1977255 - 2² = 1977251 is a prime.

1977255 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1977251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2824 + ... + 3453.

It is an arithmetic number, because the mean of its divisors is an integer number (163228).

2^1977255 is an apocalyptic number.

1977255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1977255 is a deficient number, since it is larger than the sum of its proper divisors (1940217).

1977255 is a wasteful number, since it uses less digits than its factorization.

1977255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6295 (or 6292 counting only the distinct ones).

The product of its digits is 22050, while the sum is 36.

The square root of 1977255 is about 1406.1489963727. The cubic root of 1977255 is about 125.5126678324.

The spelling of 1977255 in words is "one million, nine hundred seventy-seven thousand, two hundred fifty-five".