1285211 has 4 divisors (see below), whose sum is σ = 1287912. Its totient is φ = 1282512.

The previous prime is 1285199. The next prime is 1285213. The reversal of 1285211 is 1125821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1125821 = 541 ⋅2081.

It is a cyclic number.

It is not a de Polignac number, because 1285211 - 2⁶ = 1285147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1285213) 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, 425 + ... + 1658.

It is an arithmetic number, because the mean of its divisors is an integer number (321978).

2^1285211 is an apocalyptic number.

1285211 is a deficient number, since it is larger than the sum of its proper divisors (2701).

1285211 is an equidigital number, since it uses as much as digits as its factorization.

1285211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2700.

The product of its digits is 160, while the sum is 20.

The square root of 1285211 is about 1133.6714691656. The cubic root of 1285211 is about 108.7238471484.

The spelling of 1285211 in words is "one million, two hundred eighty-five thousand, two hundred eleven".