4665981 has 4 divisors (see below), whose sum is σ = 6221312. Its totient is φ = 3110652.

The previous prime is 4665979. The next prime is 4666021. The reversal of 4665981 is 1895664.

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.

It is not a de Polignac number, because 4665981 - 2¹ = 4665979 is a prime.

It is a super-2 number, since 2×4665981² = 43542757384722, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4665901) 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 3 ways as a sum of consecutive naturals, for example, 777661 + ... + 777666.

It is an arithmetic number, because the mean of its divisors is an integer number (1555328).

Almost surely, 2^4665981 is an apocalyptic number.

It is an amenable number.

4665981 is a deficient number, since it is larger than the sum of its proper divisors (1555331).

4665981 is a wasteful number, since it uses less digits than its factorization.

4665981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555330.

The product of its digits is 51840, while the sum is 39.

The square root of 4665981 is about 2160.0881926440. The cubic root of 4665981 is about 167.1017463568.

The spelling of 4665981 in words is "four million, six hundred sixty-five thousand, nine hundred eighty-one".