141868921 has 2 divisors, whose sum is σ = 141868922. Its totient is φ = 141868920.

The previous prime is 141868919. The next prime is 141868931. The reversal of 141868921 is 129868141.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89870400 + 51998521 = 9480^2 + 7211^2 .

It is a cyclic number.

It is not a de Polignac number, because 141868921 - 2¹ = 141868919 is a prime.

Together with 141868919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (141868931) 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, 70934460 + 70934461.

It is an arithmetic number, because the mean of its divisors is an integer number (70934461).

Almost surely, 2^141868921 is an apocalyptic number.

It is an amenable number.

141868921 is a deficient number, since it is larger than the sum of its proper divisors (1).

141868921 is an equidigital number, since it uses as much as digits as its factorization.

141868921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 40.

The square root of 141868921 is about 11910.8740653237. The cubic root of 141868921 is about 521.5497664046.

The spelling of 141868921 in words is "one hundred forty-one million, eight hundred sixty-eight thousand, nine hundred twenty-one".