3749921 has 12 divisors (see below), whose sum is σ = 4410432. Its totient is φ = 3178728.

The previous prime is 3749891. The next prime is 3749939. The reversal of 3749921 is 1299473.

It is not a de Polignac number, because 3749921 - 2¹⁰ = 3748897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3749951) 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, 4676 + ... + 5418.

It is an arithmetic number, because the mean of its divisors is an integer number (367536).

Almost surely, 2^3749921 is an apocalyptic number.

It is an amenable number.

3749921 is a deficient number, since it is larger than the sum of its proper divisors (660511).

3749921 is a wasteful number, since it uses less digits than its factorization.

3749921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860 (or 853 counting only the distinct ones).

The product of its digits is 13608, while the sum is 35.

The square root of 3749921 is about 1936.4712752840. The cubic root of 3749921 is about 155.3605343062.

The spelling of 3749921 in words is "three million, seven hundred forty-nine thousand, nine hundred twenty-one".