141520991 has 2 divisors, whose sum is σ = 141520992. Its totient is φ = 141520990.

The previous prime is 141520979. The next prime is 141520993. The reversal of 141520991 is 199025141.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-141520991 is a prime.

Together with 141520993, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_7993031 and since 141520991 and 7993031 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (141520993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70760495 + 70760496.

It is an arithmetic number, because the mean of its divisors is an integer number (70760496).

Almost surely, 2^141520991 is an apocalyptic number.

141520991 is a deficient number, since it is larger than the sum of its proper divisors (1).

141520991 is an equidigital number, since it uses as much as digits as its factorization.

141520991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 141520991 is about 11896.2595381910. The cubic root of 141520991 is about 521.1230547712.

The spelling of 141520991 in words is "one hundred forty-one million, five hundred twenty thousand, nine hundred ninety-one".