145755717 has 4 divisors (see below), whose sum is σ = 194340960. Its totient is φ = 97170476.

The previous prime is 145755703. The next prime is 145755733. The reversal of 145755717 is 717557541.

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: 717557541 = 3 ⋅239185847.

It is a cyclic number.

It is not a de Polignac number, because 145755717 - 2¹¹ = 145753669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145755737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24292617 + ... + 24292622.

It is an arithmetic number, because the mean of its divisors is an integer number (48585240).

Almost surely, 2^145755717 is an apocalyptic number.

It is an amenable number.

145755717 is a deficient number, since it is larger than the sum of its proper divisors (48585243).

145755717 is an equidigital number, since it uses as much as digits as its factorization.

145755717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48585242.

The product of its digits is 171500, while the sum is 42.

The square root of 145755717 is about 12072.9332392754. The cubic root of 145755717 is about 526.2699017718.

The spelling of 145755717 in words is "one hundred forty-five million, seven hundred fifty-five thousand, seven hundred seventeen".