1977287 has 16 divisors (see below), whose sum is σ = 2358720. Its totient is φ = 1638912.

The previous prime is 1977259. The next prime is 1977301. The reversal of 1977287 is 7827791.

It is a cyclic number.

It is not a de Polignac number, because 1977287 - 2⁶ = 1977223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1977187) 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 15 ways as a sum of consecutive naturals, for example, 4889 + ... + 5277.

It is an arithmetic number, because the mean of its divisors is an integer number (147420).

2^1977287 is an apocalyptic number.

1977287 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1977287 is a deficient number, since it is larger than the sum of its proper divisors (381433).

1977287 is a wasteful number, since it uses less digits than its factorization.

1977287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442.

The product of its digits is 49392, while the sum is 41.

The square root of 1977287 is about 1406.1603749217. The cubic root of 1977287 is about 125.5133449299.

The spelling of 1977287 in words is "one million, nine hundred seventy-seven thousand, two hundred eighty-seven".