3121461605 has 8 divisors (see below), whose sum is σ = 3760330392. Its totient is φ = 2487451648.

The previous prime is 3121461601. The next prime is 3121461617. The reversal of 3121461605 is 5061641213.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2073709444 + 1047752161 = 45538^2 + 32369^2 .

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 3121461605 - 2² = 3121461601 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121461601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1213292 + ... + 1215861.

It is an arithmetic number, because the mean of its divisors is an integer number (470041299).

Almost surely, 2^3121461605 is an apocalyptic number.

It is an amenable number.

3121461605 is a deficient number, since it is larger than the sum of its proper divisors (638868787).

3121461605 is a wasteful number, since it uses less digits than its factorization.

3121461605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429415.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 3121461605 is about 55870.0421066603. The cubic root of 3121461605 is about 1461.4568564555.

The spelling of 3121461605 in words is "three billion, one hundred twenty-one million, four hundred sixty-one thousand, six hundred five".