4158981 has 6 divisors (see below), whose sum is σ = 6007430. Its totient is φ = 2772648.

The previous prime is 4158971. The next prime is 4158989. The reversal of 4158981 is 1898514.

It can be written as a sum of positive squares in only one way, i.e., 2873025 + 1285956 = 1695^2 + 1134^2 .

It is not a de Polignac number, because 4158981 - 2¹⁷ = 4027909 is a prime.

It is a super-2 number, since 2×4158981² = 34594245916722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4158989) 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 5 ways as a sum of consecutive naturals, for example, 231046 + ... + 231063.

Almost surely, 2^4158981 is an apocalyptic number.

It is an amenable number.

4158981 is a deficient number, since it is larger than the sum of its proper divisors (1848449).

4158981 is a wasteful number, since it uses less digits than its factorization.

4158981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462115 (or 462112 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 4158981 is about 2039.3579872107. The cubic root of 4158981 is about 160.8158974778.

The spelling of 4158981 in words is "four million, one hundred fifty-eight thousand, nine hundred eighty-one".