1123431 has 16 divisors (see below), whose sum is σ = 1596000. Its totient is φ = 701568.

The previous prime is 1123429. The next prime is 1123439. The reversal of 1123431 is 1343211.

It is not a de Polignac number, because 1123431 - 2¹ = 1123429 is a prime.

It is a super-2 number, since 2×1123431² = 2524194423522, which contains 22 as substring.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1123431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3045 + ... + 3393.

It is an arithmetic number, because the mean of its divisors is an integer number (99750).

2^1123431 is an apocalyptic number.

1123431 is a deficient number, since it is larger than the sum of its proper divisors (472569).

1123431 is a wasteful number, since it uses less digits than its factorization.

1123431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418.

The product of its digits is 72, while the sum is 15.

The square root of 1123431 is about 1059.9202800211. The cubic root of 1123431 is about 103.9558182647.

Adding to 1123431 its reverse (1343211), we get a palindrome (2466642).

The spelling of 1123431 in words is "one million, one hundred twenty-three thousand, four hundred thirty-one".