3121425145 has 8 divisors (see below), whose sum is σ = 3801616704. Its totient is φ = 2459869104.

The previous prime is 3121425133. The next prime is 3121425211. The reversal of 3121425145 is 5415241213.

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 3121425145 - 2⁵ = 3121425113 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 4658509 + ... + 4659178.

It is an arithmetic number, because the mean of its divisors is an integer number (475202088).

Almost surely, 2^3121425145 is an apocalyptic number.

It is an amenable number.

3121425145 is a deficient number, since it is larger than the sum of its proper divisors (680191559).

3121425145 is an equidigital number, since it uses as much as digits as its factorization.

3121425145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9317759.

The product of its digits is 4800, while the sum is 28.

The square root of 3121425145 is about 55869.7158127728. The cubic root of 3121425145 is about 1461.4511662873.

Adding to 3121425145 its reverse (5415241213), we get a palindrome (8536666358).

The spelling of 3121425145 in words is "three billion, one hundred twenty-one million, four hundred twenty-five thousand, one hundred forty-five".