145172529 has 6 divisors (see below), whose sum is σ = 209693666. Its totient is φ = 96781680.

The previous prime is 145172507. The next prime is 145172551. The reversal of 145172529 is 925271541.

145172529 is a `hidden beast` number, since 14 + 51 + 72 + 529 = 666.

It is an interprime number because it is at equal distance from previous prime (145172507) and next prime (145172551).

It can be written as a sum of positive squares in only one way, i.e., 145154304 + 18225 = 12048^2 + 135^2 .

It is not a de Polignac number, because 145172529 - 2¹⁶ = 145106993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145172493 and 145172502.

It is not an unprimeable number, because it can be changed into a prime (145174529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8065132 + ... + 8065149.

Almost surely, 2^145172529 is an apocalyptic number.

It is an amenable number.

145172529 is a deficient number, since it is larger than the sum of its proper divisors (64521137).

145172529 is a wasteful number, since it uses less digits than its factorization.

145172529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16130287 (or 16130284 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 145172529 is about 12048.7563258620. The cubic root of 145172529 is about 525.5670716185.

The spelling of 145172529 in words is "one hundred forty-five million, one hundred seventy-two thousand, five hundred twenty-nine".