4157491 has 8 divisors (see below), whose sum is σ = 4499264. Its totient is φ = 3818880.

The previous prime is 4157477. The next prime is 4157501. The reversal of 4157491 is 1947514.

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

It is not a de Polignac number, because 4157491 - 2⁵ = 4157459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4157471) by changing a digit.

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, 2470 + ... + 3796.

It is an arithmetic number, because the mean of its divisors is an integer number (562408).

Almost surely, 2^4157491 is an apocalyptic number.

4157491 is a deficient number, since it is larger than the sum of its proper divisors (341773).

4157491 is a wasteful number, since it uses less digits than its factorization.

4157491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581.

The product of its digits is 5040, while the sum is 31.

The square root of 4157491 is about 2038.9926434394. The cubic root of 4157491 is about 160.7966905047.

The spelling of 4157491 in words is "four million, one hundred fifty-seven thousand, four hundred ninety-one".