1875525721 has 2 divisors, whose sum is σ = 1875525722. Its totient is φ = 1875525720.

The previous prime is 1875525719. The next prime is 1875525779. The reversal of 1875525721 is 1275255781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 961310025 + 914215696 = 31005^2 + 30236^2 .

It is an emirp because it is prime and its reverse (1275255781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1875525721 - 2¹ = 1875525719 is a prime.

Together with 1875525719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1875525781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 937762860 + 937762861.

It is an arithmetic number, because the mean of its divisors is an integer number (937762861).

Almost surely, 2^1875525721 is an apocalyptic number.

It is an amenable number.

1875525721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1875525721 is an equidigital number, since it uses as much as digits as its factorization.

1875525721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 196000, while the sum is 43.

The square root of 1875525721 is about 43307.3402669801. The cubic root of 1875525721 is about 1233.2212743493.

The spelling of 1875525721 in words is "one billion, eight hundred seventy-five million, five hundred twenty-five thousand, seven hundred twenty-one".