145747539 has 32 divisors (see below), whose sum is σ = 247331840. Its totient is φ = 83094336.

The previous prime is 145747531. The next prime is 145747543. The reversal of 145747539 is 935747541.

145747539 is a `hidden beast` number, since 1 + 4 + 574 + 75 + 3 + 9 = 666.

It is not a de Polignac number, because 145747539 - 2³ = 145747531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145747494 and 145747503.

It is not an unprimeable number, because it can be changed into a prime (145747531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155079 + ... + 156015.

It is an arithmetic number, because the mean of its divisors is an integer number (7729120).

Almost surely, 2^145747539 is an apocalyptic number.

145747539 is a deficient number, since it is larger than the sum of its proper divisors (101584301).

145747539 is an equidigital number, since it uses as much as digits as its factorization.

145747539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776 (or 1770 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The square root of 145747539 is about 12072.5945430135. The cubic root of 145747539 is about 526.2600590115.

The spelling of 145747539 in words is "one hundred forty-five million, seven hundred forty-seven thousand, five hundred thirty-nine".