1156143 has 16 divisors (see below), whose sum is σ = 1622880. Its totient is φ = 731136.

The previous prime is 1156121. The next prime is 1156151. The reversal of 1156143 is 3416511.

It is not a de Polignac number, because 1156143 - 2⁶ = 1156079 is a prime.

It is a super-3 number, since 3×1156143³ = 4636133325192168621, which contains 333 as substring.

It is an Ulam number.

1156143 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8371 + ... + 8507.

It is an arithmetic number, because the mean of its divisors is an integer number (101430).

2^1156143 is an apocalyptic number.

1156143 is a deficient number, since it is larger than the sum of its proper divisors (466737).

1156143 is a wasteful number, since it uses less digits than its factorization.

1156143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266.

The product of its digits is 360, while the sum is 21.

The square root of 1156143 is about 1075.2409032398. The cubic root of 1156143 is about 104.9551736093.

The spelling of 1156143 in words is "one million, one hundred fifty-six thousand, one hundred forty-three".