145039186 has 16 divisors (see below), whose sum is σ = 224046936. Its totient is φ = 70367616.

The previous prime is 145039183. The next prime is 145039187. The reversal of 145039186 is 681930541.

It can be written as a sum of positive squares in 4 ways, for example, as 143256961 + 1782225 = 11969^2 + 1335^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (145039183) 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 7 ways as a sum of consecutive naturals, for example, 26910 + ... + 31846.

Almost surely, 2^145039186 is an apocalyptic number.

145039186 is a deficient number, since it is larger than the sum of its proper divisors (79007750).

145039186 is a wasteful number, since it uses less digits than its factorization.

145039186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5373.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 145039186 is about 12043.2215789630. The cubic root of 145039186 is about 525.4061087555.

The spelling of 145039186 in words is "one hundred forty-five million, thirty-nine thousand, one hundred eighty-six".