3549981 has 8 divisors (see below), whose sum is σ = 4939200. Its totient is φ = 2263712.

The previous prime is 3549967. The next prime is 3549983. The reversal of 3549981 is 1899453.

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 3549981 - 2¹⁰ = 3548957 is a prime.

It is a super-2 number, since 2×3549981² = 25204730200722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3549983) 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, 25656 + ... + 25793.

It is an arithmetic number, because the mean of its divisors is an integer number (617400).

Almost surely, 2^3549981 is an apocalyptic number.

It is an amenable number.

3549981 is a deficient number, since it is larger than the sum of its proper divisors (1389219).

3549981 is a wasteful number, since it uses less digits than its factorization.

3549981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51475.

The product of its digits is 38880, while the sum is 39.

The square root of 3549981 is about 1884.1393260585. The cubic root of 3549981 is about 152.5487580363.

The spelling of 3549981 in words is "three million, five hundred forty-nine thousand, nine hundred eighty-one".