6159981 has 8 divisors (see below), whose sum is σ = 8256640. Its totient is φ = 4084992.

The previous prime is 6159953. The next prime is 6159983. The reversal of 6159981 is 1899516.

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

It is not a de Polignac number, because 6159981 - 2¹⁴ = 6143597 is a prime.

It is a super-2 number, since 2×6159981² = 75890731840722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6159983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4741 + ... + 5898.

It is an arithmetic number, because the mean of its divisors is an integer number (1032080).

Almost surely, 2^6159981 is an apocalyptic number.

It is an amenable number.

6159981 is a deficient number, since it is larger than the sum of its proper divisors (2096659).

6159981 is a wasteful number, since it uses less digits than its factorization.

6159981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10835.

The product of its digits is 19440, while the sum is 39.

The square root of 6159981 is about 2481.9309015361. The cubic root of 6159981 is about 183.3129406151.

It can be divided in two parts, 6159 and 981, that added together give a triangular number (7140 = T₁₁₉).

The spelling of 6159981 in words is "six million, one hundred fifty-nine thousand, nine hundred eighty-one".