4281981 has 8 divisors (see below), whose sum is σ = 6228384. Its totient is φ = 2595120.

The previous prime is 4281971. The next prime is 4281989. The reversal of 4281981 is 1891824.

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

It is not a de Polignac number, because 4281981 - 2⁷ = 4281853 is a prime.

It is a super-2 number, since 2×4281981² = 36670722568722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 129757 = 4281981 / (4 + 2 + 8 + 1 + 9 + 8 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4281989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64846 + ... + 64911.

It is an arithmetic number, because the mean of its divisors is an integer number (778548).

Almost surely, 2^4281981 is an apocalyptic number.

It is an amenable number.

4281981 is a deficient number, since it is larger than the sum of its proper divisors (1946403).

4281981 is a wasteful number, since it uses less digits than its factorization.

4281981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129771.

The product of its digits is 4608, while the sum is 33.

The square root of 4281981 is about 2069.2948074163. The cubic root of 4281981 is about 162.3858733172.

The spelling of 4281981 in words is "four million, two hundred eighty-one thousand, nine hundred eighty-one".