145788531 has 16 divisors (see below), whose sum is σ = 226347264. Its totient is φ = 81735264.

The previous prime is 145788529. The next prime is 145788553. The reversal of 145788531 is 135887541.

It is not a de Polignac number, because 145788531 - 2¹ = 145788529 is a prime.

It is a super-2 number, since 2×145788531² = 42508591542275922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145788521) 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 15 ways as a sum of consecutive naturals, for example, 64381 + ... + 66606.

It is an arithmetic number, because the mean of its divisors is an integer number (14146704).

Almost surely, 2^145788531 is an apocalyptic number.

145788531 is a deficient number, since it is larger than the sum of its proper divisors (80558733).

145788531 is a wasteful number, since it uses less digits than its factorization.

145788531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131050.

The product of its digits is 134400, while the sum is 42.

The square root of 145788531 is about 12074.2921531657. The cubic root of 145788531 is about 526.3093918747.

The spelling of 145788531 in words is "one hundred forty-five million, seven hundred eighty-eight thousand, five hundred thirty-one".