1143142401 has 12 divisors (see below), whose sum is σ = 1560468048. Its totient is φ = 744368184.

The previous prime is 1143142369. The next prime is 1143142439. The reversal of 1143142401 is 1042413411.

It is not a de Polignac number, because 1143142401 - 2⁵ = 1143142369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1143142801) 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, 97495 + ... + 108588.

It is an arithmetic number, because the mean of its divisors is an integer number (130039004).

Almost surely, 2^1143142401 is an apocalyptic number.

It is an amenable number.

1143142401 is a deficient number, since it is larger than the sum of its proper divisors (417325647).

1143142401 is an equidigital number, since it uses as much as digits as its factorization.

1143142401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206172 (or 206129 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1143142401 is about 33810.3889507352. The cubic root of 1143142401 is about 1045.6028971423.

Adding to 1143142401 its reverse (1042413411), we get a palindrome (2185555812).

The spelling of 1143142401 in words is "one billion, one hundred forty-three million, one hundred forty-two thousand, four hundred one".