1420540205 has 16 divisors (see below), whose sum is σ = 2015349120. Its totient is φ = 940494912.

The previous prime is 1420540169. The next prime is 1420540307. The reversal of 1420540205 is 5020450241.

It is a happy number.

It is not a de Polignac number, because 1420540205 - 2⁶ = 1420540141 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 698759 + ... + 700788.

It is an arithmetic number, because the mean of its divisors is an integer number (125959320).

Almost surely, 2^1420540205 is an apocalyptic number.

It is an amenable number.

1420540205 is a deficient number, since it is larger than the sum of its proper divisors (594808915).

1420540205 is a wasteful number, since it uses less digits than its factorization.

1420540205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399588.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 1420540205 is about 37690.0544573764. The cubic root of 1420540205 is about 1124.1333783478.

Adding to 1420540205 its reverse (5020450241), we get a palindrome (6440990446).

The spelling of 1420540205 in words is "one billion, four hundred twenty million, five hundred forty thousand, two hundred five".