1157143 has 12 divisors (see below), whose sum is σ = 1291248. Its totient is φ = 1035840.

The previous prime is 1157131. The next prime is 1157159. The reversal of 1157143 is 3417511.

It is not a de Polignac number, because 1157143 - 2⁵ = 1157111 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157183) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6846 + ... + 7012.

It is an arithmetic number, because the mean of its divisors is an integer number (107604).

2^1157143 is an apocalyptic number.

1157143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1157143 is a deficient number, since it is larger than the sum of its proper divisors (134105).

1157143 is a wasteful number, since it uses less digits than its factorization.

1157143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234 (or 221 counting only the distinct ones).

The product of its digits is 420, while the sum is 22.

The square root of 1157143 is about 1075.7058148025. The cubic root of 1157143 is about 104.9854250367.

The spelling of 1157143 in words is "one million, one hundred fifty-seven thousand, one hundred forty-three".