3721006 has 4 divisors (see below), whose sum is σ = 5581512. Its totient is φ = 1860502.

The previous prime is 3720989. The next prime is 3721027. The reversal of 3721006 is 6001273.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6001273 = 149 ⋅40277.

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, 930250 + ... + 930253.

It is an arithmetic number, because the mean of its divisors is an integer number (1395378).

Almost surely, 2^3721006 is an apocalyptic number.

3721006 is a deficient number, since it is larger than the sum of its proper divisors (1860506).

3721006 is a wasteful number, since it uses less digits than its factorization.

3721006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860505.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 3721006 is about 1928.9909279206. The cubic root of 3721006 is about 154.9601840152.

Adding to 3721006 its reverse (6001273), we get a palindrome (9722279).

It can be divided in two parts, 372 and 1006, that added together give a triangular number (1378 = T₅₂).

The spelling of 3721006 in words is "three million, seven hundred twenty-one thousand, six".