141991 has 2 divisors, whose sum is σ = 141992. Its totient is φ = 141990.

The previous prime is 141971. The next prime is 142007. The reversal of 141991 is 199141.

141991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 141991 - 2⁵ = 141959 is a prime.

It is a super-2 number, since 2×141991² = 40322888162, which contains 22 as substring.

It is a nialpdrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (141931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70995 + 70996.

It is an arithmetic number, because the mean of its divisors is an integer number (70996).

2¹⁴¹⁹⁹¹ is an apocalyptic number.

141991 is a deficient number, since it is larger than the sum of its proper divisors (1).

141991 is an equidigital number, since it uses as much as digits as its factorization.

141991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 25.

The square root of 141991 is about 376.8169316790. The cubic root of 141991 is about 52.1699322345.

The spelling of 141991 in words is "one hundred forty-one thousand, nine hundred ninety-one".