1123147 has 4 divisors (see below), whose sum is σ = 1182280. Its totient is φ = 1064016.

The previous prime is 1123127. The next prime is 1123151. The reversal of 1123147 is 7413211.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123147 is a prime.

It is a super-2 number, since 2×1123147² = 2522918367218, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 59113 = 1123147 / (1 + 1 + 2 + 3 + 1 + 4 + 7).

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1123127) 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, 29538 + ... + 29575.

It is an arithmetic number, because the mean of its divisors is an integer number (295570).

2^1123147 is an apocalyptic number.

1123147 is a deficient number, since it is larger than the sum of its proper divisors (59133).

1123147 is an equidigital number, since it uses as much as digits as its factorization.

1123147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59132.

The product of its digits is 168, while the sum is 19.

The square root of 1123147 is about 1059.7862992132. The cubic root of 1123147 is about 103.9470576197.

Adding to 1123147 its reverse (7413211), we get a palindrome (8536358).

Subtracting 1123147 from its reverse (7413211), we obtain a square (6290064 = 2508²).

The spelling of 1123147 in words is "one million, one hundred twenty-three thousand, one hundred forty-seven".