8420755 has 16 divisors (see below), whose sum is σ = 11796480. Its totient is φ = 5650272.

The previous prime is 8420749. The next prime is 8420771. The reversal of 8420755 is 5570248.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8420755 is a prime.

It is a super-2 number, since 2×8420755² = 141818229540050, which contains 22 as substring.

It is a d-powerful number, because it can be written as 8² + 4⁷ + 2²³ + 0 + 7² + 5² + 5⁶ .

It is an unprimeable number.

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, 915 + ... + 4204.

It is an arithmetic number, because the mean of its divisors is an integer number (737280).

Almost surely, 2^8420755 is an apocalyptic number.

8420755 is a deficient number, since it is larger than the sum of its proper divisors (3375725).

8420755 is a wasteful number, since it uses less digits than its factorization.

8420755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5178.

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 8420755 is about 2901.8537178845. The cubic root of 8420755 is about 203.4465567270.

The spelling of 8420755 in words is "eight million, four hundred twenty thousand, seven hundred fifty-five".