145423317 has 12 divisors (see below), whose sum is σ = 209961024. Its totient is φ = 89490960.

The previous prime is 145423309. The next prime is 145423339. The reversal of 145423317 is 713324541.

It is a happy number.

It is not a de Polignac number, because 145423317 - 2³ = 145423309 is a prime.

It is a super-2 number, since 2×145423317² = 42295882254564978, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145423367) 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 11 ways as a sum of consecutive naturals, for example, 142909 + ... + 143922.

It is an arithmetic number, because the mean of its divisors is an integer number (17496752).

Almost surely, 2^145423317 is an apocalyptic number.

It is an amenable number.

145423317 is a deficient number, since it is larger than the sum of its proper divisors (64537707).

145423317 is a wasteful number, since it uses less digits than its factorization.

145423317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286860 (or 286847 counting only the distinct ones).

The product of its digits is 10080, while the sum is 30.

The square root of 145423317 is about 12059.1590502821. The cubic root of 145423317 is about 525.8695395152.

Adding to 145423317 its reverse (713324541), we get a palindrome (858747858).

The spelling of 145423317 in words is "one hundred forty-five million, four hundred twenty-three thousand, three hundred seventeen".