4156961 has 4 divisors (see below), whose sum is σ = 4161300. Its totient is φ = 4152624.

The previous prime is 4156937. The next prime is 4156969. The reversal of 4156961 is 1696514.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1849600 + 2307361 = 1360^2 + 1519^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4156961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4156969) 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 3 ways as a sum of consecutive naturals, for example, 26 + ... + 2883.

It is an arithmetic number, because the mean of its divisors is an integer number (1040325).

Almost surely, 2^4156961 is an apocalyptic number.

It is an amenable number.

4156961 is a deficient number, since it is larger than the sum of its proper divisors (4339).

4156961 is a wasteful number, since it uses less digits than its factorization.

4156961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4338.

The product of its digits is 6480, while the sum is 32.

The square root of 4156961 is about 2038.8626731587. The cubic root of 4156961 is about 160.7898573877.

The spelling of 4156961 in words is "four million, one hundred fifty-six thousand, nine hundred sixty-one".