1443404421 has 16 divisors (see below), whose sum is σ = 2139688320. Its totient is φ = 961679520.

The previous prime is 1443404419. The next prime is 1443404437. The reversal of 1443404421 is 1244043441.

It is not a de Polignac number, because 1443404421 - 2¹ = 1443404419 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1443409421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30936 + ... + 61998.

It is an arithmetic number, because the mean of its divisors is an integer number (133730520).

Almost surely, 2^1443404421 is an apocalyptic number.

It is an amenable number.

1443404421 is a deficient number, since it is larger than the sum of its proper divisors (696283899).

1443404421 is a wasteful number, since it uses less digits than its factorization.

1443404421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32793 (or 32787 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 1443404421 is about 37992.1626259943. The cubic root of 1443404421 is about 1130.1324461666.

Adding to 1443404421 its reverse (1244043441), we get a palindrome (2687447862).

The spelling of 1443404421 in words is "one billion, four hundred forty-three million, four hundred four thousand, four hundred twenty-one".