3123421 has 8 divisors (see below), whose sum is σ = 3657024. Its totient is φ = 2611680.

The previous prime is 3123413. The next prime is 3123431. The reversal of 3123421 is 1243213.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3123421 - 2³ = 3123413 is a prime.

3123421 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3123395 and 3123404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3123431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5155 + ... + 5728.

It is an arithmetic number, because the mean of its divisors is an integer number (457128).

Almost surely, 2^3123421 is an apocalyptic number.

It is an amenable number.

3123421 is a deficient number, since it is larger than the sum of its proper divisors (533603).

3123421 is a wasteful number, since it uses less digits than its factorization.

3123421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10931.

The product of its digits is 144, while the sum is 16.

The square root of 3123421 is about 1767.3202878935. The cubic root of 3123421 is about 146.1762586341.

Adding to 3123421 its reverse (1243213), we get a palindrome (4366634).

The spelling of 3123421 in words is "three million, one hundred twenty-three thousand, four hundred twenty-one".