3768921 has 12 divisors (see below), whose sum is σ = 5862948. Its totient is φ = 2319264.

The previous prime is 3768913. The next prime is 3768929. The reversal of 3768921 is 1298673.

It is an interprime number because it is at equal distance from previous prime (3768913) and next prime (3768929).

It can be written as a sum of positive squares in 2 ways, for example, as 2143296 + 1625625 = 1464^2 + 1275^2 .

It is not a de Polignac number, because 3768921 - 2³ = 3768913 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3768929) 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, 15990 + ... + 16223.

It is an arithmetic number, because the mean of its divisors is an integer number (488579).

Almost surely, 2^3768921 is an apocalyptic number.

It is an amenable number.

3768921 is a deficient number, since it is larger than the sum of its proper divisors (2094027).

3768921 is a wasteful number, since it uses less digits than its factorization.

3768921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32232 (or 32229 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 3768921 is about 1941.3709073745. The cubic root of 3768921 is about 155.6224845967.

Subtracting from 3768921 its sum of digits (36), we obtain a triangular number (3768885 = T₂₇₄₅).

The spelling of 3768921 in words is "three million, seven hundred sixty-eight thousand, nine hundred twenty-one".