4156897 has 4 divisors (see below), whose sum is σ = 4178196. Its totient is φ = 4135600.

The previous prime is 4156871. The next prime is 4156903. The reversal of 4156897 is 7986514.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7986514 = 2 ⋅3993257.

It can be written as a sum of positive squares in 2 ways, for example, as 2808976 + 1347921 = 1676^2 + 1161^2 .

It is a cyclic number.

It is not a de Polignac number, because 4156897 - 2⁷ = 4156769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4156807) 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, 10354 + ... + 10747.

It is an arithmetic number, because the mean of its divisors is an integer number (1044549).

Almost surely, 2^4156897 is an apocalyptic number.

It is an amenable number.

4156897 is a deficient number, since it is larger than the sum of its proper divisors (21299).

4156897 is a wasteful number, since it uses less digits than its factorization.

4156897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21298.

The product of its digits is 60480, while the sum is 40.

The square root of 4156897 is about 2038.8469780736. The cubic root of 4156897 is about 160.7890322173.

The spelling of 4156897 in words is "four million, one hundred fifty-six thousand, eight hundred ninety-seven".