1191424 has 40 divisors (see below), whose sum is σ = 2577960. Its totient is φ = 546816.

The previous prime is 1191409. The next prime is 1191431. The reversal of 1191424 is 4241911.

1191424 is nontrivially palindromic in base 12.

It is a super-2 number, since 2×1191424² = 2838982295552, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1191395 and 1191404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6567 + ... + 6745.

It is an arithmetic number, because the mean of its divisors is an integer number (64449).

2^1191424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1191424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1288980).

1191424 is an abundant number, since it is smaller than the sum of its proper divisors (1386536).

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

1191424 is an equidigital number, since it uses as much as digits as its factorization.

1191424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210 (or 194 counting only the distinct ones).

The product of its digits is 288, while the sum is 22.

The square root of 1191424 is about 1091.5237056519. The cubic root of 1191424 is about 106.0121025697.

The spelling of 1191424 in words is "one million, one hundred ninety-one thousand, four hundred twenty-four".