145121525 has 24 divisors (see below), whose sum is σ = 190523520. Its totient is φ = 109347840.

The previous prime is 145121521. The next prime is 145121567. The reversal of 145121525 is 525121541.

It is not a de Polignac number, because 145121525 - 2² = 145121521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145121494 and 145121503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145121521) 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 23 ways as a sum of consecutive naturals, for example, 90884 + ... + 92466.

It is an arithmetic number, because the mean of its divisors is an integer number (7938480).

Almost surely, 2^145121525 is an apocalyptic number.

It is an amenable number.

145121525 is a deficient number, since it is larger than the sum of its proper divisors (45401995).

145121525 is a wasteful number, since it uses less digits than its factorization.

145121525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805 (or 1800 counting only the distinct ones).

The product of its digits is 2000, while the sum is 26.

The square root of 145121525 is about 12046.6395729266. The cubic root of 145121525 is about 525.5055146031.

The spelling of 145121525 in words is "one hundred forty-five million, one hundred twenty-one thousand, five hundred twenty-five".