420140545 has 16 divisors (see below), whose sum is σ = 568969920. Its totient is φ = 295019200.

The previous prime is 420140543. The next prime is 420140549. The reversal of 420140545 is 545041024.

It is a happy number.

It is not a de Polignac number, because 420140545 - 2¹ = 420140543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420140543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130111 + ... + 133300.

It is an arithmetic number, because the mean of its divisors is an integer number (35560620).

Almost surely, 2^420140545 is an apocalyptic number.

It is an amenable number.

420140545 is a deficient number, since it is larger than the sum of its proper divisors (148829375).

420140545 is a wasteful number, since it uses less digits than its factorization.

420140545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263456.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 420140545 is about 20497.3301920031. The cubic root of 420140545 is about 748.9707630226.

Adding to 420140545 its reverse (545041024), we get a palindrome (965181569).

The spelling of 420140545 in words is "four hundred twenty million, one hundred forty thousand, five hundred forty-five".