4155145 has 8 divisors (see below), whose sum is σ = 5108040. Its totient is φ = 3242880.

The previous prime is 4155121. The next prime is 4155161. The reversal of 4155145 is 5415514.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 139129 + 4016016 = 373^2 + 2004^2 .

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

It is not a de Polignac number, because 4155145 - 2⁵ = 4155113 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9930 + ... + 10339.

It is an arithmetic number, because the mean of its divisors is an integer number (638505).

Almost surely, 2^4155145 is an apocalyptic number.

It is an amenable number.

4155145 is a deficient number, since it is larger than the sum of its proper divisors (952895).

4155145 is a wasteful number, since it uses less digits than its factorization.

4155145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20315.

The product of its digits is 2000, while the sum is 25.

The square root of 4155145 is about 2038.4172781842. The cubic root of 4155145 is about 160.7664398870.

The spelling of 4155145 in words is "four million, one hundred fifty-five thousand, one hundred forty-five".