1421205544 has 16 divisors (see below), whose sum is σ = 2907011520. Its totient is φ = 646002480.

The previous prime is 1421205521. The next prime is 1421205587. The reversal of 1421205544 is 4455021241.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8074944 + ... + 8075119.

It is an arithmetic number, because the mean of its divisors is an integer number (181688220).

Almost surely, 2^1421205544 is an apocalyptic number.

It is an amenable number.

1421205544 is an abundant number, since it is smaller than the sum of its proper divisors (1485805976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1421205544 is a wasteful number, since it uses less digits than its factorization.

1421205544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16150080 (or 16150076 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 1421205544 is about 37698.8798772590. The cubic root of 1421205544 is about 1124.3088545589.

Adding to 1421205544 its reverse (4455021241), we get a palindrome (5876226785).

The spelling of 1421205544 in words is "one billion, four hundred twenty-one million, two hundred five thousand, five hundred forty-four".