3121894 has 8 divisors (see below), whose sum is σ = 4690728. Its totient is φ = 1558320.

The previous prime is 3121891. The next prime is 3121901. The reversal of 3121894 is 4981213.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121891) 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, 954 + ... + 2674.

It is an arithmetic number, because the mean of its divisors is an integer number (586341).

Almost surely, 2^3121894 is an apocalyptic number.

3121894 is a deficient number, since it is larger than the sum of its proper divisors (1568834).

3121894 is a wasteful number, since it uses less digits than its factorization.

3121894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2630.

The product of its digits is 1728, while the sum is 28.

The square root of 3121894 is about 1766.8882251008. Note that the first 3 decimals coincide. The cubic root of 3121894 is about 146.1524335257.

The spelling of 3121894 in words is "three million, one hundred twenty-one thousand, eight hundred ninety-four".