4156849 has 4 divisors (see below), whose sum is σ = 4161136. Its totient is φ = 4152564.

The previous prime is 4156847. The next prime is 4156871. The reversal of 4156849 is 9486514.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9486514 = 2 ⋅4743257.

It is a cyclic number.

It is not a de Polignac number, because 4156849 - 2¹ = 4156847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4156847) 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, 82 + ... + 2884.

It is an arithmetic number, because the mean of its divisors is an integer number (1040284).

Almost surely, 2^4156849 is an apocalyptic number.

It is an amenable number.

4156849 is a deficient number, since it is larger than the sum of its proper divisors (4287).

4156849 is a wasteful number, since it uses less digits than its factorization.

4156849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4286.

The product of its digits is 34560, while the sum is 37.

The square root of 4156849 is about 2038.8352066805. The cubic root of 4156849 is about 160.7884133339.

It can be divided in two parts, 4156 and 849, that added together give a palindrome (5005).

The spelling of 4156849 in words is "four million, one hundred fifty-six thousand, eight hundred forty-nine".