145642259 has 10 divisors (see below), whose sum is σ = 169908660. Its totient is φ = 124834164.

The previous prime is 145642241. The next prime is 145642283. The reversal of 145642259 is 952246541.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-145642259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145642219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 27929 + ... + 32730.

It is an arithmetic number, because the mean of its divisors is an integer number (16990866).

Almost surely, 2^145642259 is an apocalyptic number.

145642259 is a deficient number, since it is larger than the sum of its proper divisors (24266401).

145642259 is an frugal number, since it uses more digits than its factorization.

145642259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60687 (or 60666 counting only the distinct ones).

The product of its digits is 86400, while the sum is 38.

The square root of 145642259 is about 12068.2334664192. The cubic root of 145642259 is about 526.1333147221.

The spelling of 145642259 in words is "one hundred forty-five million, six hundred forty-two thousand, two hundred fifty-nine".