1287937 has 16 divisors (see below), whose sum is σ = 1589760. Its totient is φ = 1018368.

The previous prime is 1287917. The next prime is 1287947. The reversal of 1287937 is 7397821.

It is not a de Polignac number, because 1287937 - 2¹⁵ = 1255169 is a prime.

It is a deceptive number, since it divides R_1287936.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1287896 and 1287905.

It is not an unprimeable number, because it can be changed into a prime (1287917) 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, 9333 + ... + 9469.

It is an arithmetic number, because the mean of its divisors is an integer number (99360).

2^1287937 is an apocalyptic number.

1287937 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1287937 is a deficient number, since it is larger than the sum of its proper divisors (301823).

1287937 is a wasteful number, since it uses less digits than its factorization.

1287937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240.

The product of its digits is 21168, while the sum is 37.

The square root of 1287937 is about 1134.8731206615. The cubic root of 1287937 is about 108.8006625266.

The spelling of 1287937 in words is "one million, two hundred eighty-seven thousand, nine hundred thirty-seven".