145185938 has 4 divisors (see below), whose sum is σ = 217778910. Its totient is φ = 72592968.

The previous prime is 145185923. The next prime is 145185941. The reversal of 145185938 is 839581541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 138462289 + 6723649 = 11767^2 + 2593^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 36296483 + ... + 36296486.

Almost surely, 2^145185938 is an apocalyptic number.

145185938 is a deficient number, since it is larger than the sum of its proper divisors (72592972).

145185938 is an equidigital number, since it uses as much as digits as its factorization.

145185938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72592971.

The product of its digits is 172800, while the sum is 44.

The square root of 145185938 is about 12049.3127604856. The cubic root of 145185938 is about 525.5832526227.

The spelling of 145185938 in words is "one hundred forty-five million, one hundred eighty-five thousand, nine hundred thirty-eight".