145004217 has 4 divisors (see below), whose sum is σ = 193338960. Its totient is φ = 96669476.

The previous prime is 145004201. The next prime is 145004239. The reversal of 145004217 is 712400541.

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.

It is a cyclic number.

It is not a de Polignac number, because 145004217 - 2⁴ = 145004201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145004287) 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 3 ways as a sum of consecutive naturals, for example, 24167367 + ... + 24167372.

It is an arithmetic number, because the mean of its divisors is an integer number (48334740).

Almost surely, 2^145004217 is an apocalyptic number.

It is an amenable number.

145004217 is a deficient number, since it is larger than the sum of its proper divisors (48334743).

145004217 is an equidigital number, since it uses as much as digits as its factorization.

145004217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48334742.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 145004217 is about 12041.7696789135. The cubic root of 145004217 is about 525.3638801609.

Adding to 145004217 its reverse (712400541), we get a palindrome (857404758).

The spelling of 145004217 in words is "one hundred forty-five million, four thousand, two hundred seventeen".