1153143021 has 8 divisors (see below), whose sum is σ = 1559179584. Its totient is φ = 757934240.

The previous prime is 1153142983. The next prime is 1153143029. The reversal of 1153143021 is 1203413511.

1153143021 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1153143021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153143029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2706696 + ... + 2707121.

It is an arithmetic number, because the mean of its divisors is an integer number (194897448).

Almost surely, 2^1153143021 is an apocalyptic number.

It is an amenable number.

1153143021 is a deficient number, since it is larger than the sum of its proper divisors (406036563).

1153143021 is an equidigital number, since it uses as much as digits as its factorization.

1153143021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5413891.

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

The square root of 1153143021 is about 33957.9596118495. The cubic root of 1153143021 is about 1048.6431516948.

Adding to 1153143021 its reverse (1203413511), we get a palindrome (2356556532).

The spelling of 1153143021 in words is "one billion, one hundred fifty-three million, one hundred forty-three thousand, twenty-one".