875402221 has 2 divisors, whose sum is σ = 875402222. Its totient is φ = 875402220.

The previous prime is 875402201. The next prime is 875402243. The reversal of 875402221 is 122204578.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 869424196 + 5978025 = 29486^2 + 2445^2 .

It is a cyclic number.

It is not a de Polignac number, because 875402221 - 2²³ = 867013613 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (875402201) by changing a digit.

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 as a sum of consecutive naturals, namely, 437701110 + 437701111.

It is an arithmetic number, because the mean of its divisors is an integer number (437701111).

Almost surely, 2^875402221 is an apocalyptic number.

It is an amenable number.

875402221 is a deficient number, since it is larger than the sum of its proper divisors (1).

875402221 is an equidigital number, since it uses as much as digits as its factorization.

875402221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 875402221 is about 29587.1969101502. The cubic root of 875402221 is about 956.6121253342.

Adding to 875402221 its reverse (122204578), we get a palindrome (997606799).

The spelling of 875402221 in words is "eight hundred seventy-five million, four hundred two thousand, two hundred twenty-one".