1143278411 has 8 divisors (see below), whose sum is σ = 1301439744. Its totient is φ = 994154920.

The previous prime is 1143278401. The next prime is 1143278413. The reversal of 1143278411 is 1148723411.

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

It is a de Polignac number, because none of the positive numbers 2^k-1143278411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1143278413) 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, 2259191 + ... + 2259696.

It is an arithmetic number, because the mean of its divisors is an integer number (162679968).

Almost surely, 2^1143278411 is an apocalyptic number.

1143278411 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1143278411 is a deficient number, since it is larger than the sum of its proper divisors (158161333).

1143278411 is a wasteful number, since it uses less digits than its factorization.

1143278411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4518921.

The product of its digits is 5376, while the sum is 32.

The square root of 1143278411 is about 33812.4002549361. The cubic root of 1143278411 is about 1045.6443637785.

The spelling of 1143278411 in words is "one billion, one hundred forty-three million, two hundred seventy-eight thousand, four hundred eleven".