145151717 has 4 divisors (see below), whose sum is σ = 145393836. Its totient is φ = 144909600.

The previous prime is 145151711. The next prime is 145151731. The reversal of 145151717 is 717151541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44169316 + 100982401 = 6646^2 + 10049^2 .

It is a cyclic number.

It is not a de Polignac number, because 145151717 - 2⁶ = 145151653 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 (145151711) 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, 120158 + ... + 121359.

It is an arithmetic number, because the mean of its divisors is an integer number (36348459).

Almost surely, 2^145151717 is an apocalyptic number.

It is an amenable number.

145151717 is a deficient number, since it is larger than the sum of its proper divisors (242119).

145151717 is an equidigital number, since it uses as much as digits as its factorization.

145151717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242118.

The product of its digits is 4900, while the sum is 32.

The square root of 145151717 is about 12047.8926373038. The cubic root of 145151717 is about 525.5419552398.

The spelling of 145151717 in words is "one hundred forty-five million, one hundred fifty-one thousand, seven hundred seventeen".