6420135 has 24 divisors (see below), whose sum is σ = 10919376. Its totient is φ = 3220480.

The previous prime is 6420109. The next prime is 6420173. The reversal of 6420135 is 5310246.

It is a happy number.

It is not a de Polignac number, because 6420135 - 2⁵ = 6420103 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3595 + ... + 5075.

It is an arithmetic number, because the mean of its divisors is an integer number (454974).

Almost surely, 2^6420135 is an apocalyptic number.

6420135 is a deficient number, since it is larger than the sum of its proper divisors (4499241).

6420135 is a wasteful number, since it uses less digits than its factorization.

6420135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523 (or 1506 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 6420135 is about 2533.7985318490. The cubic root of 6420135 is about 185.8580544955.

It can be divided in two parts, 6420 and 135, that added together give a triangular number (6555 = T₁₁₄).

The spelling of 6420135 in words is "six million, four hundred twenty thousand, one hundred thirty-five".