3766721 has 12 divisors (see below), whose sum is σ = 4437888. Its totient is φ = 3130392.

The previous prime is 3766709. The next prime is 3766739. The reversal of 3766721 is 1276673.

It is not a de Polignac number, because 3766721 - 2¹⁴ = 3750337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3766751) 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, 35150 + ... + 35256.

It is an arithmetic number, because the mean of its divisors is an integer number (369824).

Almost surely, 2^3766721 is an apocalyptic number.

It is an amenable number.

3766721 is a deficient number, since it is larger than the sum of its proper divisors (671167).

3766721 is an equidigital number, since it uses as much as digits as its factorization.

3766721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268 (or 161 counting only the distinct ones).

The product of its digits is 10584, while the sum is 32.

The square root of 3766721 is about 1940.8042147522. The cubic root of 3766721 is about 155.5921986427.

It can be divided in two parts, 376672 and 1, that added together give a palindrome (376673).

The spelling of 3766721 in words is "three million, seven hundred sixty-six thousand, seven hundred twenty-one".