145489121 has 4 divisors (see below), whose sum is σ = 145535232. Its totient is φ = 145443012.

The previous prime is 145489109. The next prime is 145489129. The reversal of 145489121 is 121984541.

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 145489121 - 2¹⁰ = 145488097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145489129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17945 + ... + 24758.

It is an arithmetic number, because the mean of its divisors is an integer number (36383808).

Almost surely, 2^145489121 is an apocalyptic number.

It is an amenable number.

145489121 is a deficient number, since it is larger than the sum of its proper divisors (46111).

145489121 is an equidigital number, since it uses as much as digits as its factorization.

145489121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46110.

The product of its digits is 11520, while the sum is 35.

The square root of 145489121 is about 12061.8871243268. The cubic root of 145489121 is about 525.9488461485.

The spelling of 145489121 in words is "one hundred forty-five million, four hundred eighty-nine thousand, one hundred twenty-one".