6406155 has 32 divisors (see below), whose sum is σ = 13017600. Its totient is φ = 2928096.

The previous prime is 6406151. The next prime is 6406177. The reversal of 6406155 is 5516046.

It is a happy number.

6406155 is a `hidden beast` number, since 6 + 40 + 615 + 5 = 666.

It is not a de Polignac number, because 6406155 - 2² = 6406151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (6406151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2445 + ... + 4334.

It is an arithmetic number, because the mean of its divisors is an integer number (406800).

Almost surely, 2^6406155 is an apocalyptic number.

6406155 is an abundant number, since it is smaller than the sum of its proper divisors (6611445).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6406155 is a wasteful number, since it uses less digits than its factorization.

6406155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6800 (or 6794 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 6406155 is about 2531.0383244827. The cubic root of 6406155 is about 185.7230529814.

It can be divided in two parts, 6406 and 155, that added together give a 8-th power (6561 = 3⁸).

The spelling of 6406155 in words is "six million, four hundred six thousand, one hundred fifty-five".