141561491 has 2 divisors, whose sum is σ = 141561492. Its totient is φ = 141561490.

The previous prime is 141561467. The next prime is 141561521. The reversal of 141561491 is 194165141.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 141561491 - 2¹⁰ = 141560467 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (141561401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70780745 + 70780746.

It is an arithmetic number, because the mean of its divisors is an integer number (70780746).

Almost surely, 2^141561491 is an apocalyptic number.

141561491 is a deficient number, since it is larger than the sum of its proper divisors (1).

141561491 is an equidigital number, since it uses as much as digits as its factorization.

141561491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 32.

The square root of 141561491 is about 11897.9616321452. The cubic root of 141561491 is about 521.1727611094.

The spelling of 141561491 in words is "one hundred forty-one million, five hundred sixty-one thousand, four hundred ninety-one".