1206591 has 4 divisors (see below), whose sum is σ = 1608792. Its totient is φ = 804392.

The previous prime is 1206587. The next prime is 1206619. The reversal of 1206591 is 1956021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1206591 - 2² = 1206587 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206581) 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, 201096 + ... + 201101.

It is an arithmetic number, because the mean of its divisors is an integer number (402198).

2^1206591 is an apocalyptic number.

1206591 is a deficient number, since it is larger than the sum of its proper divisors (402201).

1206591 is an equidigital number, since it uses as much as digits as its factorization.

1206591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402200.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 1206591 is about 1098.4493616003. The cubic root of 1206591 is about 106.4600568763.

The spelling of 1206591 in words is "one million, two hundred six thousand, five hundred ninety-one".