2125865437 has 2 divisors, whose sum is σ = 2125865438. Its totient is φ = 2125865436.

The previous prime is 2125865359. The next prime is 2125865447. The reversal of 2125865437 is 7345685212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2109656761 + 16208676 = 45931^2 + 4026^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2125865437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2125865393 and 2125865402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2125865447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062932718 + 1062932719.

It is an arithmetic number, because the mean of its divisors is an integer number (1062932719).

Almost surely, 2^2125865437 is an apocalyptic number.

It is an amenable number.

2125865437 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125865437 is an equidigital number, since it uses as much as digits as its factorization.

2125865437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 43.

The square root of 2125865437 is about 46107.1083131441. The cubic root of 2125865437 is about 1285.8153035802.

The spelling of 2125865437 in words is "two billion, one hundred twenty-five million, eight hundred sixty-five thousand, four hundred thirty-seven".