1123457 has 4 divisors (see below), whose sum is σ = 1126356. Its totient is φ = 1120560.

The previous prime is 1123439. The next prime is 1123477. The reversal of 1123457 is 7543211.

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

It can be written as a sum of positive squares in 2 ways, for example, as 758641 + 364816 = 871^2 + 604^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123457 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1123427) 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, 758 + ... + 1679.

It is an arithmetic number, because the mean of its divisors is an integer number (281589).

2^1123457 is an apocalyptic number.

It is an amenable number.

1123457 is a deficient number, since it is larger than the sum of its proper divisors (2899).

1123457 is an equidigital number, since it uses as much as digits as its factorization.

1123457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898.

The product of its digits is 840, while the sum is 23.

The square root of 1123457 is about 1059.9325450235. The cubic root of 1123457 is about 103.9566202218.

Adding to 1123457 its reverse (7543211), we get a palindrome (8666668).

The spelling of 1123457 in words is "one million, one hundred twenty-three thousand, four hundred fifty-seven".