4005157 has 8 divisors (see below), whose sum is σ = 4395384. Its totient is φ = 3626688.

The previous prime is 4005137. The next prime is 4005173. The reversal of 4005157 is 7515004.

It can be written as a sum of positive squares in 4 ways, for example, as 641601 + 3363556 = 801^2 + 1834^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-4005157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4005137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2218 + ... + 3595.

It is an arithmetic number, because the mean of its divisors is an integer number (549423).

Almost surely, 2^4005157 is an apocalyptic number.

It is an amenable number.

4005157 is a deficient number, since it is larger than the sum of its proper divisors (390227).

4005157 is a wasteful number, since it uses less digits than its factorization.

4005157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5879.

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 4005157 is about 2001.2888347263. The cubic root of 4005157 is about 158.8082944611.

The spelling of 4005157 in words is "four million, five thousand, one hundred fifty-seven".