1143647421 has 8 divisors (see below), whose sum is σ = 1742700864. Its totient is φ = 653512800.

The previous prime is 1143647413. The next prime is 1143647429. The reversal of 1143647421 is 1247463411.

It is an interprime number because it is at equal distance from previous prime (1143647413) and next prime (1143647429).

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

It is not a de Polignac number, because 1143647421 - 2³ = 1143647413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143647429) 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, 27229680 + ... + 27229721.

It is an arithmetic number, because the mean of its divisors is an integer number (217837608).

Almost surely, 2^1143647421 is an apocalyptic number.

It is an amenable number.

1143647421 is a deficient number, since it is larger than the sum of its proper divisors (599053443).

1143647421 is an equidigital number, since it uses as much as digits as its factorization.

1143647421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54459411.

The product of its digits is 16128, while the sum is 33.

The square root of 1143647421 is about 33817.8565405911. The cubic root of 1143647421 is about 1045.7568507333.

The spelling of 1143647421 in words is "one billion, one hundred forty-three million, six hundred forty-seven thousand, four hundred twenty-one".