1157273 has 4 divisors (see below), whose sum is σ = 1246308. Its totient is φ = 1068240.

The previous prime is 1157263. The next prime is 1157279. The reversal of 1157273 is 3727511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3727511 = 881 ⋅4231.

It can be written as a sum of positive squares in 2 ways, for example, as 473344 + 683929 = 688^2 + 827^2 .

It is a cyclic number.

It is not a de Polignac number, because 1157273 - 2⁴ = 1157257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1157279) 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, 44498 + ... + 44523.

It is an arithmetic number, because the mean of its divisors is an integer number (311577).

2^1157273 is an apocalyptic number.

1157273 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1157273 is a deficient number, since it is larger than the sum of its proper divisors (89035).

1157273 is an equidigital number, since it uses as much as digits as its factorization.

1157273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89034.

The product of its digits is 1470, while the sum is 26.

The square root of 1157273 is about 1075.7662385481. The cubic root of 1157273 is about 104.9893564419.

It can be divided in two parts, 11 and 57273, that multiplied together give a triangular number (630003 = T₁₁₂₂).

The spelling of 1157273 in words is "one million, one hundred fifty-seven thousand, two hundred seventy-three".