5605981 has 8 divisors (see below), whose sum is σ = 5817344. Its totient is φ = 5397840.

The previous prime is 5605949. The next prime is 5605991. The reversal of 5605981 is 1895065.

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

It is a cyclic number.

It is not a de Polignac number, because 5605981 - 2⁵ = 5605949 is a prime.

It is a super-2 number, since 2×5605981² = 62854045944722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5605991) 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, 3076 + ... + 4546.

It is an arithmetic number, because the mean of its divisors is an integer number (727168).

Almost surely, 2^5605981 is an apocalyptic number.

It is an amenable number.

5605981 is a deficient number, since it is larger than the sum of its proper divisors (211363).

5605981 is a wasteful number, since it uses less digits than its factorization.

5605981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 5605981 is about 2367.6952928956. The cubic root of 5605981 is about 177.6439987335.

The spelling of 5605981 in words is "five million, six hundred five thousand, nine hundred eighty-one".