146642591 has 2 divisors, whose sum is σ = 146642592. Its totient is φ = 146642590.

The previous prime is 146642569. The next prime is 146642603. The reversal of 146642591 is 195246641.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146642591 is a prime.

It is a Sophie Germain 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 (146642501) 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, 73321295 + 73321296.

It is an arithmetic number, because the mean of its divisors is an integer number (73321296).

Almost surely, 2^146642591 is an apocalyptic number.

146642591 is a deficient number, since it is larger than the sum of its proper divisors (1).

146642591 is an equidigital number, since it uses as much as digits as its factorization.

146642591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 38.

The square root of 146642591 is about 12109.6073842218. The cubic root of 146642591 is about 527.3351353193.

The spelling of 146642591 in words is "one hundred forty-six million, six hundred forty-two thousand, five hundred ninety-one".