145318986 has 12 divisors (see below), whose sum is σ = 314857842. Its totient is φ = 48439656.

The previous prime is 145318981. The next prime is 145318993. The reversal of 145318986 is 689813541.

It can be written as a sum of positive squares in only one way, i.e., 131813361 + 13505625 = 11481^2 + 3675^2 .

It is a super-2 number, since 2×145318986² = 42235215384136392, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (145318981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4036621 + ... + 4036656.

Almost surely, 2^145318986 is an apocalyptic number.

145318986 is an abundant number, since it is smaller than the sum of its proper divisors (169538856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145318986 is a wasteful number, since it uses less digits than its factorization.

145318986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8073285 (or 8073282 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 145318986 is about 12054.8324749870. The cubic root of 145318986 is about 525.7437512951.

The spelling of 145318986 in words is "one hundred forty-five million, three hundred eighteen thousand, nine hundred eighty-six".