4279981 has 2 divisors, whose sum is σ = 4279982. Its totient is φ = 4279980.

The previous prime is 4279973. The next prime is 4279991. The reversal of 4279981 is 1899724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3802500 + 477481 = 1950^2 + 691^2 .

It is a cyclic number.

It is not a de Polignac number, because 4279981 - 2³ = 4279973 is a prime.

It is a super-2 number, since 2×4279981² = 36636474720722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4279991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2139990 + 2139991.

It is an arithmetic number, because the mean of its divisors is an integer number (2139991).

Almost surely, 2^4279981 is an apocalyptic number.

It is an amenable number.

4279981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4279981 is an equidigital number, since it uses as much as digits as its factorization.

4279981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The square root of 4279981 is about 2068.8114945543. The cubic root of 4279981 is about 162.3605873321.

The spelling of 4279981 in words is "four million, two hundred seventy-nine thousand, nine hundred eighty-one".