3121481 has 4 divisors (see below), whose sum is σ = 3405264. Its totient is φ = 2837700.

The previous prime is 3121457. The next prime is 3121487. The reversal of 3121481 is 1841213.

3121481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3121481 - 2¹⁰ = 3120457 is a prime.

It is a super-2 number, since 2×3121481² = 19487287266722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141875 + ... + 141896.

It is an arithmetic number, because the mean of its divisors is an integer number (851316).

Almost surely, 2^3121481 is an apocalyptic number.

It is an amenable number.

3121481 is a deficient number, since it is larger than the sum of its proper divisors (283783).

3121481 is a wasteful number, since it uses less digits than its factorization.

3121481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283782.

The product of its digits is 192, while the sum is 20.

The square root of 3121481 is about 1766.7713490998. The cubic root of 3121481 is about 146.1459883338.

Adding to 3121481 its reverse (1841213), we get a palindrome (4962694).

It can be divided in two parts, 31 and 21481, that added together give a palindrome (21512).

The spelling of 3121481 in words is "three million, one hundred twenty-one thousand, four hundred eighty-one".