3749421 has 16 divisors (see below), whose sum is σ = 5433344. Its totient is φ = 2286144.

The previous prime is 3749407. The next prime is 3749443. The reversal of 3749421 is 1249473.

It is a happy number.

It is not a de Polignac number, because 3749421 - 2⁷ = 3749293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3749461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4575 + ... + 5331.

It is an arithmetic number, because the mean of its divisors is an integer number (339584).

Almost surely, 2^3749421 is an apocalyptic number.

It is an amenable number.

3749421 is a deficient number, since it is larger than the sum of its proper divisors (1683923).

3749421 is a wasteful number, since it uses less digits than its factorization.

3749421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900.

The product of its digits is 6048, while the sum is 30.

The square root of 3749421 is about 1936.3421701755. The cubic root of 3749421 is about 155.3536289412.

The spelling of 3749421 in words is "three million, seven hundred forty-nine thousand, four hundred twenty-one".