3782421 has 6 divisors (see below), whose sum is σ = 5463510. Its totient is φ = 2521608.

The previous prime is 3782417. The next prime is 3782437. The reversal of 3782421 is 1242873.

It can be written as a sum of positive squares in only one way, i.e., 3663396 + 119025 = 1914^2 + 345^2 .

It is not a de Polignac number, because 3782421 - 2² = 3782417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3782461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 210126 + ... + 210143.

It is an arithmetic number, because the mean of its divisors is an integer number (910585).

Almost surely, 2^3782421 is an apocalyptic number.

It is an amenable number.

3782421 is a deficient number, since it is larger than the sum of its proper divisors (1681089).

3782421 is a wasteful number, since it uses less digits than its factorization.

3782421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420275 (or 420272 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 3782421 is about 1944.8447238790. The cubic root of 3782421 is about 155.8080726464.

The spelling of 3782421 in words is "three million, seven hundred eighty-two thousand, four hundred twenty-one".