1421204444 has 24 divisors (see below), whose sum is σ = 2751428736. Its totient is φ = 636902000.

The previous prime is 1421204417. The next prime is 1421204461. The reversal of 1421204444 is 4444021241.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224342 + ... + 230589.

It is an arithmetic number, because the mean of its divisors is an integer number (114642864).

Almost surely, 2^1421204444 is an apocalyptic number.

It is an amenable number.

1421204444 is a deficient number, since it is larger than the sum of its proper divisors (1330224292).

1421204444 is a wasteful number, since it uses less digits than its factorization.

1421204444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455017 (or 455015 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

The square root of 1421204444 is about 37698.8652879632. The cubic root of 1421204444 is about 1124.3085644906.

Adding to 1421204444 its reverse (4444021241), we get a palindrome (5865225685).

The spelling of 1421204444 in words is "one billion, four hundred twenty-one million, two hundred four thousand, four hundred forty-four".