1875872561 has 2 divisors, whose sum is σ = 1875872562. Its totient is φ = 1875872560.

The previous prime is 1875872519. The next prime is 1875872639. The reversal of 1875872561 is 1652785781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1862440336 + 13432225 = 43156^2 + 3665^2 .

It is a cyclic number.

It is not a de Polignac number, because 1875872561 - 2¹⁰ = 1875871537 is a prime.

It is a super-2 number, since 2×1875872561² = 7037795730225397442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1875872461) 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, 937936280 + 937936281.

It is an arithmetic number, because the mean of its divisors is an integer number (937936281).

Almost surely, 2^1875872561 is an apocalyptic number.

It is an amenable number.

1875872561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1875872561 is an equidigital number, since it uses as much as digits as its factorization.

1875872561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 940800, while the sum is 50.

The square root of 1875872561 is about 43311.3444838647. The cubic root of 1875872561 is about 1233.2972893208.

It can be divided in two parts, 18758 and 72561, that added together give a palindrome (91319).

The spelling of 1875872561 in words is "one billion, eight hundred seventy-five million, eight hundred seventy-two thousand, five hundred sixty-one".