1122591 has 8 divisors (see below), whose sum is σ = 1510960. Its totient is φ = 741312.

The previous prime is 1122587. The next prime is 1122599. The reversal of 1122591 is 1952211.

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

It is not a de Polignac number, because 1122591 - 2² = 1122587 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122599) 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, 1390 + ... + 2043.

It is an arithmetic number, because the mean of its divisors is an integer number (188870).

2^1122591 is an apocalyptic number.

1122591 is a deficient number, since it is larger than the sum of its proper divisors (388369).

1122591 is a wasteful number, since it uses less digits than its factorization.

1122591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3545.

The product of its digits is 180, while the sum is 21.

The square root of 1122591 is about 1059.5239497057. The cubic root of 1122591 is about 103.9299022211.

Multiplying 1122591 by its sum of digits (21), we get a triangular number (23574411 = T₆₈₆₆).

The spelling of 1122591 in words is "one million, one hundred twenty-two thousand, five hundred ninety-one".