1421755983 has 20 divisors (see below), whose sum is σ = 2140596480. Its totient is φ = 940367232.

The previous prime is 1421755967. The next prime is 1421755991. The reversal of 1421755983 is 3895571241.

1421755983 is a `hidden beast` number, since 1 + 4 + 2 + 17 + 559 + 83 = 666.

It is not a de Polignac number, because 1421755983 - 2⁴ = 1421755967 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421755903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 58818 + ... + 79391.

It is an arithmetic number, because the mean of its divisors is an integer number (107029824).

Almost surely, 2^1421755983 is an apocalyptic number.

1421755983 is a deficient number, since it is larger than the sum of its proper divisors (718840497).

1421755983 is a wasteful number, since it uses less digits than its factorization.

1421755983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138348 (or 138339 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 1421755983 is about 37706.1796394172. The cubic root of 1421755983 is about 1124.4539857037.

The spelling of 1421755983 in words is "one billion, four hundred twenty-one million, seven hundred fifty-five thousand, nine hundred eighty-three".