1157321 has 4 divisors (see below), whose sum is σ = 1262544. Its totient is φ = 1052100.

The previous prime is 1157293. The next prime is 1157327. The reversal of 1157321 is 1237511.

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: 1237511 = 11 ⋅112501.

It is a cyclic number.

It is not a de Polignac number, because 1157321 - 2⁶ = 1157257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1157293 and 1157302.

It is not an unprimeable number, because it can be changed into a prime (1157327) 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, 52595 + ... + 52616.

It is an arithmetic number, because the mean of its divisors is an integer number (315636).

2^1157321 is an apocalyptic number.

1157321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1157321 is a deficient number, since it is larger than the sum of its proper divisors (105223).

1157321 is a wasteful number, since it uses less digits than its factorization.

1157321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105222.

The product of its digits is 210, while the sum is 20.

The square root of 1157321 is about 1075.7885479963. The cubic root of 1157321 is about 104.9908079633.

The spelling of 1157321 in words is "one million, one hundred fifty-seven thousand, three hundred twenty-one".