3726921 has 12 divisors (see below), whose sum is σ = 5462576. Its totient is φ = 2258520.

The previous prime is 3726911. The next prime is 3726923. The reversal of 3726921 is 1296273.

3726921 = T₄₀ + T₄₁ + ... + T₂₈₁.

It is not a de Polignac number, because 3726921 - 2⁵ = 3726889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3726923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4771 + ... + 5496.

Almost surely, 2^3726921 is an apocalyptic number.

It is an amenable number.

3726921 is a deficient number, since it is larger than the sum of its proper divisors (1735655).

3726921 is a wasteful number, since it uses less digits than its factorization.

3726921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10292 (or 10281 counting only the distinct ones).

The product of its digits is 4536, while the sum is 30.

The square root of 3726921 is about 1930.5235041304. The cubic root of 3726921 is about 155.0422500155.

The spelling of 3726921 in words is "three million, seven hundred twenty-six thousand, nine hundred twenty-one".