145942517 has 4 divisors (see below), whose sum is σ = 166791456. Its totient is φ = 125093580.

The previous prime is 145942487. The next prime is 145942523. The reversal of 145942517 is 715249541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 715249541 = 881 ⋅811861.

It is a cyclic number.

It is not a de Polignac number, because 145942517 - 2²⁶ = 78833653 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 (145942117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10424459 + ... + 10424472.

It is an arithmetic number, because the mean of its divisors is an integer number (41697864).

Almost surely, 2^145942517 is an apocalyptic number.

It is an amenable number.

145942517 is a deficient number, since it is larger than the sum of its proper divisors (20848939).

145942517 is an equidigital number, since it uses as much as digits as its factorization.

145942517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20848938.

The product of its digits is 50400, while the sum is 38.

The square root of 145942517 is about 12080.6670759524. The cubic root of 145942517 is about 526.4946276644.

The spelling of 145942517 in words is "one hundred forty-five million, nine hundred forty-two thousand, five hundred seventeen".