3550621 has 4 divisors (see below), whose sum is σ = 3569212. Its totient is φ = 3532032.

The previous prime is 3550619. The next prime is 3550633. The reversal of 3550621 is 1260553.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2134521 + 1416100 = 1461^2 + 1190^2 .

It is a cyclic number.

It is not a de Polignac number, because 3550621 - 2¹ = 3550619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3550592 and 3550601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3550681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9006 + ... + 9391.

It is an arithmetic number, because the mean of its divisors is an integer number (892303).

Almost surely, 2^3550621 is an apocalyptic number.

It is an amenable number.

3550621 is a deficient number, since it is larger than the sum of its proper divisors (18591).

3550621 is a wasteful number, since it uses less digits than its factorization.

3550621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18590.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 3550621 is about 1884.3091572245. The cubic root of 3550621 is about 152.5579247839.

The spelling of 3550621 in words is "three million, five hundred fifty thousand, six hundred twenty-one".