1287213 has 8 divisors (see below), whose sum is σ = 1771776. Its totient is φ = 830400.

The previous prime is 1287199. The next prime is 1287217. The reversal of 1287213 is 3127821.

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

It is not a de Polignac number, because 1287213 - 2⁴ = 1287197 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287217) 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, 6828 + ... + 7013.

It is an arithmetic number, because the mean of its divisors is an integer number (221472).

2^1287213 is an apocalyptic number.

It is an amenable number.

1287213 is a deficient number, since it is larger than the sum of its proper divisors (484563).

1287213 is a wasteful number, since it uses less digits than its factorization.

1287213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13875.

The product of its digits is 672, while the sum is 24.

The square root of 1287213 is about 1134.5540974321. The cubic root of 1287213 is about 108.7802716626.

The spelling of 1287213 in words is "one million, two hundred eighty-seven thousand, two hundred thirteen".