3550981 has 6 divisors (see below), whose sum is σ = 4130790. Its totient is φ = 3043656.

The previous prime is 3550979. The next prime is 3550999. The reversal of 3550981 is 1890553.

3550981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2265025 + 1285956 = 1505^2 + 1134^2 .

It is not a de Polignac number, because 3550981 - 2¹ = 3550979 is a prime.

It is a super-2 number, since 2×3550981² = 25218932124722, 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 (3550931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36186 + ... + 36283.

It is an arithmetic number, because the mean of its divisors is an integer number (688465).

Almost surely, 2^3550981 is an apocalyptic number.

It is an amenable number.

3550981 is a deficient number, since it is larger than the sum of its proper divisors (579809).

3550981 is an equidigital number, since it uses as much as digits as its factorization.

3550981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72483 (or 72476 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 3550981 is about 1884.4046805291. The cubic root of 3550981 is about 152.5630805953.

The spelling of 3550981 in words is "three million, five hundred fifty thousand, nine hundred eighty-one".