145509786 has 12 divisors (see below), whose sum is σ = 315271242. Its totient is φ = 48503256.

The previous prime is 145509773. The next prime is 145509803. The reversal of 145509786 is 687905541.

145509786 is a `hidden beast` number, since 1 + 4 + 550 + 97 + 8 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 138650625 + 6859161 = 11775^2 + 2619^2 .

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 in 5 ways as a sum of consecutive naturals, for example, 4041921 + ... + 4041956.

Almost surely, 2^145509786 is an apocalyptic number.

145509786 is an abundant number, since it is smaller than the sum of its proper divisors (169761456).

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

145509786 is a wasteful number, since it uses less digits than its factorization.

145509786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8083885 (or 8083882 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 145509786 is about 12062.7437177451. The cubic root of 145509786 is about 525.9737465632.

It can be divided in two parts, 14550 and 9786, that added together give a square (24336 = 156²).

The spelling of 145509786 in words is "one hundred forty-five million, five hundred nine thousand, seven hundred eighty-six".