1291206 has 32 divisors (see below), whose sum is σ = 2999808. Its totient is φ = 362880.

The previous prime is 1291193. The next prime is 1291211. The reversal of 1291206 is 6021921.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2766 + ... + 3198.

It is an arithmetic number, because the mean of its divisors is an integer number (93744).

2^1291206 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1291206, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1499904).

1291206 is an abundant number, since it is smaller than the sum of its proper divisors (1708602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1291206 is a wasteful number, since it uses less digits than its factorization.

1291206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1291206 is about 1136.3124570293. The cubic root of 1291206 is about 108.8926361954.

The spelling of 1291206 in words is "one million, two hundred ninety-one thousand, two hundred six".