145221242165 has 8 divisors (see below), whose sum is σ = 174271847328. Its totient is φ = 116172755920.

The previous prime is 145221242129. The next prime is 145221242167. The reversal of 145221242165 is 561242122541.

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

It is not a de Polignac number, because 145221242165 - 2²⁴ = 145204464949 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 (145221242167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374831 + ... + 656460.

It is an arithmetic number, because the mean of its divisors is an integer number (21783980916).

Almost surely, 2^145221242165 is an apocalyptic number.

It is an amenable number.

145221242165 is a deficient number, since it is larger than the sum of its proper divisors (29050605163).

145221242165 is a wasteful number, since it uses less digits than its factorization.

145221242165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059459.

The product of its digits is 38400, while the sum is 35.

The spelling of 145221242165 in words is "one hundred forty-five billion, two hundred twenty-one million, two hundred forty-two thousand, one hundred sixty-five".