420136755 has 8 divisors (see below), whose sum is σ = 672218832. Its totient is φ = 224072928.

The previous prime is 420136751. The next prime is 420136771. The reversal of 420136755 is 557631024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 420136755 - 2² = 420136751 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420136751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14004544 + ... + 14004573.

It is an arithmetic number, because the mean of its divisors is an integer number (84027354).

Almost surely, 2^420136755 is an apocalyptic number.

420136755 is a deficient number, since it is larger than the sum of its proper divisors (252082077).

420136755 is a wasteful number, since it uses less digits than its factorization.

420136755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28009125.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 420136755 is about 20497.2377407298. The cubic root of 420136755 is about 748.9685109129.

Adding to 420136755 its reverse (557631024), we get a palindrome (977767779).

The spelling of 420136755 in words is "four hundred twenty million, one hundred thirty-six thousand, seven hundred fifty-five".