1143491001 has 8 divisors (see below), whose sum is σ = 1526963904. Its totient is φ = 761172720.

The previous prime is 1143490981. The next prime is 1143491033. The reversal of 1143491001 is 1001943411.

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

It is not a de Polignac number, because 1143491001 - 2⁶ = 1143490937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1143491101) 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, 286341 + ... + 290306.

It is an arithmetic number, because the mean of its divisors is an integer number (190870488).

Almost surely, 2^1143491001 is an apocalyptic number.

It is an amenable number.

1143491001 is a deficient number, since it is larger than the sum of its proper divisors (383472903).

1143491001 is an equidigital number, since it uses as much as digits as its factorization.

1143491001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577311.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1143491001 is about 33815.5437779729. The cubic root of 1143491001 is about 1045.7091714860.

The spelling of 1143491001 in words is "one billion, one hundred forty-three million, four hundred ninety-one thousand, one".