145521713 has 12 divisors (see below), whose sum is σ = 154316160. Its totient is φ = 136947096.

The previous prime is 145521707. The next prime is 145521721. The reversal of 145521713 is 317125541.

It is not a de Polignac number, because 145521713 - 2⁸ = 145521457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145521763) 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 11 ways as a sum of consecutive naturals, for example, 514070 + ... + 514352.

It is an arithmetic number, because the mean of its divisors is an integer number (12859680).

Almost surely, 2^145521713 is an apocalyptic number.

It is an amenable number.

145521713 is a deficient number, since it is larger than the sum of its proper divisors (8794447).

145521713 is an frugal number, since it uses more digits than its factorization.

145521713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668 (or 385 counting only the distinct ones).

The product of its digits is 4200, while the sum is 29.

The square root of 145521713 is about 12063.2380810461. The cubic root of 145521713 is about 525.9881169999.

The spelling of 145521713 in words is "one hundred forty-five million, five hundred twenty-one thousand, seven hundred thirteen".