145597187 has 2 divisors, whose sum is σ = 145597188. Its totient is φ = 145597186.

The previous prime is 145597181. The next prime is 145597213. The reversal of 145597187 is 781795541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145597187 - 2²⁰ = 144548611 is a prime.

It is not a weakly prime, because it can be changed into another prime (145597181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72798593 + 72798594.

It is an arithmetic number, because the mean of its divisors is an integer number (72798594).

Almost surely, 2^145597187 is an apocalyptic number.

145597187 is a deficient number, since it is larger than the sum of its proper divisors (1).

145597187 is an equidigital number, since it uses as much as digits as its factorization.

145597187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352800, while the sum is 47.

The square root of 145597187 is about 12066.3659400832. The cubic root of 145597187 is about 526.0790348549.

The spelling of 145597187 in words is "one hundred forty-five million, five hundred ninety-seven thousand, one hundred eighty-seven".