4617981 has 6 divisors (see below), whose sum is σ = 6670430. Its totient is φ = 3078648.

The previous prime is 4617979. The next prime is 4618001. The reversal of 4617981 is 1897164.

It can be written as a sum of positive squares in only one way, i.e., 2340900 + 2277081 = 1530^2 + 1509^2 .

It is not a de Polignac number, because 4617981 - 2¹ = 4617979 is a prime.

It is a super-2 number, since 2×4617981² = 42651497032722, which contains 22 as substring.

It is an Ulam 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 (4617901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 256546 + ... + 256563.

Almost surely, 2^4617981 is an apocalyptic number.

It is an amenable number.

4617981 is a deficient number, since it is larger than the sum of its proper divisors (2052449).

4617981 is a wasteful number, since it uses less digits than its factorization.

4617981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513115 (or 513112 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 4617981 is about 2148.9488127920. The cubic root of 4617981 is about 166.5267657103.

The spelling of 4617981 in words is "four million, six hundred seventeen thousand, nine hundred eighty-one".