145719986 has 16 divisors (see below), whose sum is σ = 229967640. Its totient is φ = 69160320.

The previous prime is 145719961. The next prime is 145719989. The reversal of 145719986 is 689917541.

It can be written as a sum of positive squares in 4 ways, for example, as 117831025 + 27888961 = 10855^2 + 5281^2 .

It is not an unprimeable number, because it can be changed into a prime (145719989) 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, 20981 + ... + 27048.

Almost surely, 2^145719986 is an apocalyptic number.

145719986 is a deficient number, since it is larger than the sum of its proper divisors (84247654).

145719986 is a wasteful number, since it uses less digits than its factorization.

145719986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48109.

The product of its digits is 544320, while the sum is 50.

The square root of 145719986 is about 12071.4533507776. The cubic root of 145719986 is about 526.2268944556.

The spelling of 145719986 in words is "one hundred forty-five million, seven hundred nineteen thousand, nine hundred eighty-six".