1287211 has 8 divisors (see below), whose sum is σ = 1328400. Its totient is φ = 1246752.

The previous prime is 1287199. The next prime is 1287217. The reversal of 1287211 is 1127821.

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

It is a cyclic number.

It is not a de Polignac number, because 1287211 - 2⁵ = 1287179 is a prime.

It is a pancake number, because a pancake can be divided into 1287211 parts by 1604 straight cuts.

It is a Duffinian 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, 7816 + ... + 7978.

It is an arithmetic number, because the mean of its divisors is an integer number (166050).

2^1287211 is an apocalyptic number.

1287211 is a deficient number, since it is larger than the sum of its proper divisors (41189).

1287211 is a wasteful number, since it uses less digits than its factorization.

1287211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365.

The product of its digits is 224, while the sum is 22.

The square root of 1287211 is about 1134.5532160282. The cubic root of 1287211 is about 108.7802153237.

The spelling of 1287211 in words is "one million, two hundred eighty-seven thousand, two hundred eleven".