145218125 has 40 divisors (see below), whose sum is σ = 199304952. Its totient is φ = 105120000.

The previous prime is 145218119. The next prime is 145218133. The reversal of 145218125 is 521812541.

It can be written as a sum of positive squares in 20 ways, for example, as 143376676 + 1841449 = 11974^2 + 1357^2 .

It is not a de Polignac number, because 145218125 - 2¹⁸ = 144955981 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 495479 + ... + 495771.

Almost surely, 2^145218125 is an apocalyptic number.

It is an amenable number.

145218125 is a deficient number, since it is larger than the sum of its proper divisors (54086827).

145218125 is an equidigital number, since it uses as much as digits as its factorization.

145218125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387 (or 372 counting only the distinct ones).

The product of its digits is 3200, while the sum is 29.

The square root of 145218125 is about 12050.6483228082. The cubic root of 145218125 is about 525.6220894834.

The spelling of 145218125 in words is "one hundred forty-five million, two hundred eighteen thousand, one hundred twenty-five".