3125121543 has 24 divisors (see below), whose sum is σ = 4795238448. Its totient is φ = 1954444032.

The previous prime is 3125121487. The next prime is 3125121553. The reversal of 3125121543 is 3451215213.

It is not a de Polignac number, because 3125121543 - 2²⁵ = 3091567111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3125121553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13705 + ... + 80237.

It is an arithmetic number, because the mean of its divisors is an integer number (199801602).

Almost surely, 2^3125121543 is an apocalyptic number.

3125121543 is a deficient number, since it is larger than the sum of its proper divisors (1670116905).

3125121543 is a wasteful number, since it uses less digits than its factorization.

3125121543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66863 (or 66860 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 3125121543 is about 55902.7865405652. The cubic root of 3125121543 is about 1462.0278232014.

Adding to 3125121543 its reverse (3451215213), we get a palindrome (6576336756).

The spelling of 3125121543 in words is "three billion, one hundred twenty-five million, one hundred twenty-one thousand, five hundred forty-three".