1140543021 has 16 divisors (see below), whose sum is σ = 1608587136. Its totient is φ = 717336576.

The previous prime is 1140542993. The next prime is 1140543023. The reversal of 1140543021 is 1203450411.

It is not a de Polignac number, because 1140543021 - 2⁵ = 1140542989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140543023) 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, 108180 + ... + 118253.

It is an arithmetic number, because the mean of its divisors is an integer number (100536696).

Almost surely, 2^1140543021 is an apocalyptic number.

It is an amenable number.

1140543021 is a deficient number, since it is larger than the sum of its proper divisors (468044115).

1140543021 is a wasteful number, since it uses less digits than its factorization.

1140543021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226532.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1140543021 is about 33771.9265218909. The cubic root of 1140543021 is about 1044.8097670400.

Adding to 1140543021 its reverse (1203450411), we get a palindrome (2343993432).

The spelling of 1140543021 in words is "one billion, one hundred forty million, five hundred forty-three thousand, twenty-one".