145438517 has 8 divisors (see below), whose sum is σ = 169608000. Its totient is φ = 124661292.

The previous prime is 145438507. The next prime is 145438523. The reversal of 145438517 is 715834541.

It is not a de Polignac number, because 145438517 - 2⁸ = 145438261 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 (145438507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211667 + ... + 212352.

It is an arithmetic number, because the mean of its divisors is an integer number (21201000).

Almost surely, 2^145438517 is an apocalyptic number.

It is an amenable number.

145438517 is a deficient number, since it is larger than the sum of its proper divisors (24169483).

145438517 is an frugal number, since it uses more digits than its factorization.

145438517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424040 (or 424026 counting only the distinct ones).

The product of its digits is 67200, while the sum is 38.

The square root of 145438517 is about 12059.7892601820. The cubic root of 145438517 is about 525.8878605995.

The spelling of 145438517 in words is "one hundred forty-five million, four hundred thirty-eight thousand, five hundred seventeen".