1143212429 has 4 divisors (see below), whose sum is σ = 1144001760. Its totient is φ = 1142423100.

The previous prime is 1143212423. The next prime is 1143212459. The reversal of 1143212429 is 9242123411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1143212429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143212423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392489 + ... + 395390.

It is an arithmetic number, because the mean of its divisors is an integer number (286000440).

Almost surely, 2^1143212429 is an apocalyptic number.

It is an amenable number.

1143212429 is a deficient number, since it is larger than the sum of its proper divisors (789331).

1143212429 is an equidigital number, since it uses as much as digits as its factorization.

1143212429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789330.

The product of its digits is 3456, while the sum is 29.

The square root of 1143212429 is about 33811.4245337282. The cubic root of 1143212429 is about 1045.6242476420.

The spelling of 1143212429 in words is "one billion, one hundred forty-three million, two hundred twelve thousand, four hundred twenty-nine".