420140455 has 12 divisors (see below), whose sum is σ = 586482120. Its totient is φ = 288096144.

The previous prime is 420140419. The next prime is 420140459. The reversal of 420140455 is 554041024.

It is a happy number.

It is not a de Polignac number, because 420140455 - 2⁷ = 420140327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420140459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 857185 + ... + 857674.

It is an arithmetic number, because the mean of its divisors is an integer number (48873510).

Almost surely, 2^420140455 is an apocalyptic number.

420140455 is a deficient number, since it is larger than the sum of its proper divisors (166341665).

420140455 is a wasteful number, since it uses less digits than its factorization.

420140455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714878 (or 1714871 counting only the distinct ones).

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

The square root of 420140455 is about 20497.3279965951. The cubic root of 420140455 is about 748.9707095426.

Adding to 420140455 its reverse (554041024), we get a palindrome (974181479).

The spelling of 420140455 in words is "four hundred twenty million, one hundred forty thousand, four hundred fifty-five".