420145455 has 16 divisors (see below), whose sum is σ = 686536704. Its totient is φ = 219309600.

The previous prime is 420145421. The next prime is 420145477. The reversal of 420145455 is 554541024.

It is not a de Polignac number, because 420145455 - 2⁶ = 420145391 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 297271 + ... + 298680.

It is an arithmetic number, because the mean of its divisors is an integer number (42908544).

Almost surely, 2^420145455 is an apocalyptic number.

420145455 is a deficient number, since it is larger than the sum of its proper divisors (266391249).

420145455 is a wasteful number, since it uses less digits than its factorization.

420145455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596006.

The product of its (nonzero) digits is 16000, while the sum is 30.

The square root of 420145455 is about 20497.4499633491. The cubic root of 420145455 is about 748.9736806432.

Adding to 420145455 its reverse (554541024), we get a palindrome (974686479).

The spelling of 420145455 in words is "four hundred twenty million, one hundred forty-five thousand, four hundred fifty-five".