3126421 has 4 divisors (see below), whose sum is σ = 3173152. Its totient is φ = 3079692.

The previous prime is 3126397. The next prime is 3126427. The reversal of 3126421 is 1246213.

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 3126421 - 2⁷ = 3126293 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3126427) 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 3 ways as a sum of consecutive naturals, for example, 23265 + ... + 23398.

It is an arithmetic number, because the mean of its divisors is an integer number (793288).

Almost surely, 2^3126421 is an apocalyptic number.

It is an amenable number.

3126421 is a deficient number, since it is larger than the sum of its proper divisors (46731).

3126421 is an equidigital number, since it uses as much as digits as its factorization.

3126421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46730.

The product of its digits is 288, while the sum is 19.

The square root of 3126421 is about 1768.1688267810. The cubic root of 3126421 is about 146.2230437084.

The spelling of 3126421 in words is "three million, one hundred twenty-six thousand, four hundred twenty-one".