145885825 has 18 divisors (see below), whose sum is σ = 182912834. Its totient is φ = 115422720.

The previous prime is 145885807. The next prime is 145885829. The reversal of 145885825 is 528588541.

It can be written as a sum of positive squares in 9 ways, for example, as 100942209 + 44943616 = 10047^2 + 6704^2 .

It is not a de Polignac number, because 145885825 - 2¹⁹ = 145361537 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145885829) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 318997 + ... + 319453.

Almost surely, 2^145885825 is an apocalyptic number.

It is an amenable number.

145885825 is a deficient number, since it is larger than the sum of its proper divisors (37027009).

145885825 is an equidigital number, since it uses as much as digits as its factorization.

145885825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693 (or 575 counting only the distinct ones).

The product of its digits is 512000, while the sum is 46.

The square root of 145885825 is about 12078.3204544341. The cubic root of 145885825 is about 526.4264457990.

The spelling of 145885825 in words is "one hundred forty-five million, eight hundred eighty-five thousand, eight hundred twenty-five".