4157939 has 4 divisors (see below), whose sum is σ = 4163256. Its totient is φ = 4152624.

The previous prime is 4157929. The next prime is 4157947. The reversal of 4157939 is 9397514.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4157939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4157929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1229 + ... + 3134.

It is an arithmetic number, because the mean of its divisors is an integer number (1040814).

Almost surely, 2^4157939 is an apocalyptic number.

4157939 is a deficient number, since it is larger than the sum of its proper divisors (5317).

4157939 is an equidigital number, since it uses as much as digits as its factorization.

4157939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5316.

The product of its digits is 34020, while the sum is 38.

The square root of 4157939 is about 2039.1024986498. The cubic root of 4157939 is about 160.8024659696.

The spelling of 4157939 in words is "four million, one hundred fifty-seven thousand, nine hundred thirty-nine".