145541217 has 8 divisors (see below), whose sum is σ = 202492224. Its totient is φ = 92808848.

The previous prime is 145541183. The next prime is 145541261. The reversal of 145541217 is 712145541.

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

It is a cyclic number.

It is not a de Polignac number, because 145541217 - 2¹² = 145537121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145541287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1054578 + ... + 1054715.

It is an arithmetic number, because the mean of its divisors is an integer number (25311528).

Almost surely, 2^145541217 is an apocalyptic number.

It is an amenable number.

145541217 is a deficient number, since it is larger than the sum of its proper divisors (56951007).

145541217 is a wasteful number, since it uses less digits than its factorization.

145541217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2109319.

The product of its digits is 5600, while the sum is 30.

The square root of 145541217 is about 12064.0464604543. The cubic root of 145541217 is about 526.0116150143.

Adding to 145541217 its reverse (712145541), we get a palindrome (857686758).

The spelling of 145541217 in words is "one hundred forty-five million, five hundred forty-one thousand, two hundred seventeen".