3543981 has 8 divisors (see below), whose sum is σ = 5400384. Its totient is φ = 2025120.

The previous prime is 3543979. The next prime is 3543983. The reversal of 3543981 is 1893453.

It is an interprime number because it is at equal distance from previous prime (3543979) and next prime (3543983).

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

It is not a de Polignac number, because 3543981 - 2¹ = 3543979 is a prime.

It is a super-2 number, since 2×3543981² = 25119602656722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3543983) 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, 84360 + ... + 84401.

It is an arithmetic number, because the mean of its divisors is an integer number (675048).

Almost surely, 2^3543981 is an apocalyptic number.

It is an amenable number.

3543981 is a deficient number, since it is larger than the sum of its proper divisors (1856403).

3543981 is a wasteful number, since it uses less digits than its factorization.

3543981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168771.

The product of its digits is 12960, while the sum is 33.

The square root of 3543981 is about 1882.5464137705. The cubic root of 3543981 is about 152.4627661495.

The spelling of 3543981 in words is "three million, five hundred forty-three thousand, nine hundred eighty-one".