3579981 has 8 divisors (see below), whose sum is σ = 4794240. Its totient is φ = 2376192.

The previous prime is 3579959. The next prime is 3580001. The reversal of 3579981 is 1899753.

It is a happy number.

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

It is not a de Polignac number, because 3579981 - 2⁵ = 3579949 is a prime.

It is a super-2 number, since 2×3579981² = 25632527920722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3579931) 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, 1780 + ... + 3213.

It is an arithmetic number, because the mean of its divisors is an integer number (599280).

Almost surely, 2^3579981 is an apocalyptic number.

It is an amenable number.

3579981 is a deficient number, since it is larger than the sum of its proper divisors (1214259).

3579981 is a wasteful number, since it uses less digits than its factorization.

3579981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5235.

The product of its digits is 68040, while the sum is 42.

The square root of 3579981 is about 1892.0837719298. The cubic root of 3579981 is about 152.9772703216.

It can be divided in two parts, 3579 and 981, that added together give a triangular number (4560 = T₉₅).

The spelling of 3579981 in words is "three million, five hundred seventy-nine thousand, nine hundred eighty-one".