1421444421 has 24 divisors (see below), whose sum is σ = 2111942976. Its totient is φ = 920747520.

The previous prime is 1421444419. The next prime is 1421444447. The reversal of 1421444421 is 1244441241.

It is a happy number.

1421444421 is a `hidden beast` number, since 1 + 4 + 214 + 4 + 442 + 1 = 666.

It is not a de Polignac number, because 1421444421 - 2¹ = 1421444419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421444221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65176 + ... + 84206.

It is an arithmetic number, because the mean of its divisors is an integer number (87997624).

Almost surely, 2^1421444421 is an apocalyptic number.

It is an amenable number.

1421444421 is a deficient number, since it is larger than the sum of its proper divisors (690498555).

1421444421 is a wasteful number, since it uses less digits than its factorization.

1421444421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19273 (or 19270 counting only the distinct ones).

The product of its digits is 4096, while the sum is 27.

The square root of 1421444421 is about 37702.0479682470. The cubic root of 1421444421 is about 1124.3718425111.

Adding to 1421444421 its reverse (1244441241), we get a palindrome (2665885662).

The spelling of 1421444421 in words is "one billion, four hundred twenty-one million, four hundred forty-four thousand, four hundred twenty-one".