1287941 has 8 divisors (see below), whose sum is σ = 1338240. Its totient is φ = 1238688.

The previous prime is 1287917. The next prime is 1287947. The reversal of 1287941 is 1497821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1287941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1287898 and 1287907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2945 + ... + 3353.

It is an arithmetic number, because the mean of its divisors is an integer number (167280).

2^1287941 is an apocalyptic number.

It is an amenable number.

1287941 is a deficient number, since it is larger than the sum of its proper divisors (50299).

1287941 is an equidigital number, since it uses as much as digits as its factorization.

1287941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523.

The product of its digits is 4032, while the sum is 32.

The square root of 1287941 is about 1134.8748829717. The cubic root of 1287941 is about 108.8007751621.

The spelling of 1287941 in words is "one million, two hundred eighty-seven thousand, nine hundred forty-one".