1122391 has 8 divisors (see below), whose sum is σ = 1201824. Its totient is φ = 1044480.

The previous prime is 1122389. The next prime is 1122397. The reversal of 1122391 is 1932211.

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

It is not a de Polignac number, because 1122391 - 2¹ = 1122389 is a prime.

It is a Duffinian number.

1122391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122397) 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, 1431 + ... + 2071.

It is an arithmetic number, because the mean of its divisors is an integer number (150228).

2^1122391 is an apocalyptic number.

1122391 is a deficient number, since it is larger than the sum of its proper divisors (79433).

1122391 is a wasteful number, since it uses less digits than its factorization.

1122391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761.

The product of its digits is 108, while the sum is 19.

The square root of 1122391 is about 1059.4295634916. The cubic root of 1122391 is about 103.9237298292.

The spelling of 1122391 in words is "one million, one hundred twenty-two thousand, three hundred ninety-one".