145595591 has 2 divisors, whose sum is σ = 145595592. Its totient is φ = 145595590.

The previous prime is 145595587. The next prime is 145595603. The reversal of 145595591 is 195595541.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145595591 - 2² = 145595587 is a prime.

It is a super-2 number, since 2×145595591² = 42396152237278562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145595501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72797795 + 72797796.

It is an arithmetic number, because the mean of its divisors is an integer number (72797796).

Almost surely, 2^145595591 is an apocalyptic number.

145595591 is a deficient number, since it is larger than the sum of its proper divisors (1).

145595591 is an equidigital number, since it uses as much as digits as its factorization.

145595591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 202500, while the sum is 44.

The square root of 145595591 is about 12066.2998056571. The cubic root of 145595591 is about 526.0771125988.

The spelling of 145595591 in words is "one hundred forty-five million, five hundred ninety-five thousand, five hundred ninety-one".