1287411 has 4 divisors (see below), whose sum is σ = 1716552. Its totient is φ = 858272.

The previous prime is 1287401. The next prime is 1287431. The reversal of 1287411 is 1147821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1287411 - 2⁶ = 1287347 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1287401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214566 + ... + 214571.

It is an arithmetic number, because the mean of its divisors is an integer number (429138).

2^1287411 is an apocalyptic number.

1287411 is a deficient number, since it is larger than the sum of its proper divisors (429141).

1287411 is an equidigital number, since it uses as much as digits as its factorization.

1287411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429140.

The product of its digits is 448, while the sum is 24.

The square root of 1287411 is about 1134.6413530275. The cubic root of 1287411 is about 108.7858489291.

The spelling of 1287411 in words is "one million, two hundred eighty-seven thousand, four hundred eleven".