6403155 has 32 divisors (see below), whose sum is σ = 11294208. Its totient is φ = 3072000.

The previous prime is 6403153. The next prime is 6403157. The reversal of 6403155 is 5513046.

It is an interprime number because it is at equal distance from previous prime (6403153) and next prime (6403157).

It is not a de Polignac number, because 6403155 - 2¹ = 6403153 is a prime.

6403155 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6403151) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 24787 + ... + 25043.

It is an arithmetic number, because the mean of its divisors is an integer number (352944).

Almost surely, 2^6403155 is an apocalyptic number.

6403155 is a deficient number, since it is larger than the sum of its proper divisors (4891053).

6403155 is a wasteful number, since it uses less digits than its factorization.

6403155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 6403155 is about 2530.4456129307. The cubic root of 6403155 is about 185.6940571092.

The spelling of 6403155 in words is "six million, four hundred three thousand, one hundred fifty-five".