4157997 has 8 divisors (see below), whose sum is σ = 5554080. Its totient is φ = 2766960.

The previous prime is 4157981. The next prime is 4158001. The reversal of 4157997 is 7997514.

It is a happy number.

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

It is not a de Polignac number, because 4157997 - 2⁴ = 4157981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4157927) 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, 1579 + ... + 3287.

It is an arithmetic number, because the mean of its divisors is an integer number (694260).

Almost surely, 2^4157997 is an apocalyptic number.

It is an amenable number.

4157997 is a deficient number, since it is larger than the sum of its proper divisors (1396083).

4157997 is a wasteful number, since it uses less digits than its factorization.

4157997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2523.

The product of its digits is 79380, while the sum is 42.

The square root of 4157997 is about 2039.1167205435. The cubic root of 4157997 is about 160.8032136557.

The spelling of 4157997 in words is "four million, one hundred fifty-seven thousand, nine hundred ninety-seven".