1157493 has 4 divisors (see below), whose sum is σ = 1543328. Its totient is φ = 771660.

The previous prime is 1157491. The next prime is 1157503. The reversal of 1157493 is 3947511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3947511 = 3 ⋅1315837.

It is not a de Polignac number, because 1157493 - 2¹ = 1157491 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1157493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192913 + ... + 192918.

It is an arithmetic number, because the mean of its divisors is an integer number (385832).

2^1157493 is an apocalyptic number.

It is an amenable number.

1157493 is a deficient number, since it is larger than the sum of its proper divisors (385835).

1157493 is an equidigital number, since it uses as much as digits as its factorization.

1157493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385834.

The product of its digits is 3780, while the sum is 30.

The square root of 1157493 is about 1075.8684863867. The cubic root of 1157493 is about 104.9960089186.

The spelling of 1157493 in words is "one million, one hundred fifty-seven thousand, four hundred ninety-three".