3551806 has 4 divisors (see below), whose sum is σ = 5327712. Its totient is φ = 1775902.

The previous prime is 3551797. The next prime is 3551813. The reversal of 3551806 is 6081553.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6081553 = 229 ⋅26557.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 887950 + ... + 887953.

It is an arithmetic number, because the mean of its divisors is an integer number (1331928).

Almost surely, 2^3551806 is an apocalyptic number.

3551806 is a deficient number, since it is larger than the sum of its proper divisors (1775906).

3551806 is a wasteful number, since it uses less digits than its factorization.

3551806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775905.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 3551806 is about 1884.6235698409. The cubic root of 3551806 is about 152.5748946823.

It can be divided in two parts, 355180 and 6, that multiplied together give a triangular number (2131080 = T₂₀₆₄).

The spelling of 3551806 in words is "three million, five hundred fifty-one thousand, eight hundred six".