3121254505 has 8 divisors (see below), whose sum is σ = 3745930824. Its totient is φ = 2496720000.

The previous prime is 3121254449. The next prime is 3121254509. The reversal of 3121254505 is 5054521213.

It can be written as a sum of positive squares in 4 ways, for example, as 1947986496 + 1173268009 = 44136^2 + 34253^2 .

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

It is not a de Polignac number, because 3121254505 - 2¹⁵ = 3121221737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121254509) 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 7 ways as a sum of consecutive naturals, for example, 21205 + ... + 81805.

It is an arithmetic number, because the mean of its divisors is an integer number (468241353).

Almost surely, 2^3121254505 is an apocalyptic number.

It is an amenable number.

3121254505 is a deficient number, since it is larger than the sum of its proper divisors (624676319).

3121254505 is a wasteful number, since it uses less digits than its factorization.

3121254505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70907.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 3121254505 is about 55868.1886676130. The cubic root of 3121254505 is about 1461.4245345876.

Adding to 3121254505 its reverse (5054521213), we get a palindrome (8175775718).

The spelling of 3121254505 in words is "three billion, one hundred twenty-one million, two hundred fifty-four thousand, five hundred five".