1134643421 has 4 divisors (see below), whose sum is σ = 1136286144. Its totient is φ = 1133000700.

The previous prime is 1134643417. The next prime is 1134643439. The reversal of 1134643421 is 1243464311.

It is a happy number.

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 not a de Polignac number, because 1134643421 - 2² = 1134643417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1134643441) 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, 820325 + ... + 821706.

It is an arithmetic number, because the mean of its divisors is an integer number (284071536).

Almost surely, 2^1134643421 is an apocalyptic number.

It is an amenable number.

1134643421 is a deficient number, since it is larger than the sum of its proper divisors (1642723).

1134643421 is an equidigital number, since it uses as much as digits as its factorization.

1134643421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642722.

The product of its digits is 6912, while the sum is 29.

The square root of 1134643421 is about 33684.4685426385. The cubic root of 1134643421 is about 1043.0051826788.

The spelling of 1134643421 in words is "one billion, one hundred thirty-four million, six hundred forty-three thousand, four hundred twenty-one".