1443401421 has 32 divisors (see below), whose sum is σ = 2401394688. Its totient is φ = 749202240.

The previous prime is 1443401389. The next prime is 1443401471. The reversal of 1443401421 is 1241043441.

It is not a de Polignac number, because 1443401421 - 2⁵ = 1443401389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1443401391 and 1443401400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1443401471) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 454180 + ... + 457346.

It is an arithmetic number, because the mean of its divisors is an integer number (75043584).

Almost surely, 2^1443401421 is an apocalyptic number.

1443401421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1443401421 is a deficient number, since it is larger than the sum of its proper divisors (957993267).

1443401421 is a wasteful number, since it uses less digits than its factorization.

1443401421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5161.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 1443401421 is about 37992.1231441466. The cubic root of 1443401421 is about 1130.1316632029.

Adding to 1443401421 its reverse (1241043441), we get a palindrome (2684444862).

The spelling of 1443401421 in words is "one billion, four hundred forty-three million, four hundred one thousand, four hundred twenty-one".