1420521205 has 16 divisors (see below), whose sum is σ = 1761217920. Its totient is φ = 1099058112.

The previous prime is 1420521143. The next prime is 1420521209. The reversal of 1420521205 is 5021250241.

It is a cyclic number.

It is not a de Polignac number, because 1420521205 - 2¹¹ = 1420519157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420521209) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7906 + ... + 53884.

It is an arithmetic number, because the mean of its divisors is an integer number (110076120).

Almost surely, 2^1420521205 is an apocalyptic number.

It is an amenable number.

1420521205 is a deficient number, since it is larger than the sum of its proper divisors (340696715).

1420521205 is a wasteful number, since it uses less digits than its factorization.

1420521205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46188.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 1420521205 is about 37689.8024006494. The cubic root of 1420521205 is about 1124.1283664916.

Adding to 1420521205 its reverse (5021250241), we get a palindrome (6441771446).

The spelling of 1420521205 in words is "one billion, four hundred twenty million, five hundred twenty-one thousand, two hundred five".