4157949 has 16 divisors (see below), whose sum is σ = 5822208. Its totient is φ = 2636352.

The previous prime is 4157947. The next prime is 4157981. The reversal of 4157949 is 9497514.

It is not a de Polignac number, because 4157949 - 2¹ = 4157947 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4157947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4819 + ... + 5615.

It is an arithmetic number, because the mean of its divisors is an integer number (363888).

Almost surely, 2^4157949 is an apocalyptic number.

It is an amenable number.

4157949 is a deficient number, since it is larger than the sum of its proper divisors (1664259).

4157949 is a wasteful number, since it uses less digits than its factorization.

4157949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884.

The product of its digits is 45360, while the sum is 39.

The square root of 4157949 is about 2039.1049507075. The cubic root of 4157949 is about 160.8025948815.

The spelling of 4157949 in words is "four million, one hundred fifty-seven thousand, nine hundred forty-nine".