3919421 has 4 divisors (see below), whose sum is σ = 4275744. Its totient is φ = 3563100.

The previous prime is 3919417. The next prime is 3919441. The reversal of 3919421 is 1249193.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3919421 - 2² = 3919417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3919411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178145 + ... + 178166.

It is an arithmetic number, because the mean of its divisors is an integer number (1068936).

Almost surely, 2^3919421 is an apocalyptic number.

It is an amenable number.

3919421 is a deficient number, since it is larger than the sum of its proper divisors (356323).

3919421 is a wasteful number, since it uses less digits than its factorization.

3919421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356322.

The product of its digits is 1944, while the sum is 29.

The square root of 3919421 is about 1979.7527623418. The cubic root of 3919421 is about 157.6669398141. Note that the first 3 decimals are identical.

The spelling of 3919421 in words is "three million, nine hundred nineteen thousand, four hundred twenty-one".