145668417 has 8 divisors (see below), whose sum is σ = 194351424. Its totient is φ = 97048848.

The previous prime is 145668389. The next prime is 145668437. The reversal of 145668417 is 714866541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145668417 - 2⁸ = 145668161 is a prime.

It is a super-2 number, since 2×145668417² = 42438575422571778, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145668437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10213 + ... + 19890.

It is an arithmetic number, because the mean of its divisors is an integer number (24293928).

Almost surely, 2^145668417 is an apocalyptic number.

It is an amenable number.

145668417 is a deficient number, since it is larger than the sum of its proper divisors (48683007).

145668417 is a wasteful number, since it uses less digits than its factorization.

145668417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31719.

The product of its digits is 161280, while the sum is 42.

The square root of 145668417 is about 12069.3171720690. The cubic root of 145668417 is about 526.1648114673.

The spelling of 145668417 in words is "one hundred forty-five million, six hundred sixty-eight thousand, four hundred seventeen".