145220089 has 16 divisors (see below), whose sum is σ = 171774976. Its totient is φ = 120139200.

The previous prime is 145220087. The next prime is 145220107. The reversal of 145220089 is 980022541.

It is a cyclic number.

It is not a de Polignac number, because 145220089 - 2¹ = 145220087 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145220089.

It is not an unprimeable number, because it can be changed into a prime (145220087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116779 + ... + 118015.

It is an arithmetic number, because the mean of its divisors is an integer number (10735936).

Almost surely, 2^145220089 is an apocalyptic number.

It is an amenable number.

145220089 is a deficient number, since it is larger than the sum of its proper divisors (26554887).

145220089 is a wasteful number, since it uses less digits than its factorization.

145220089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 145220089 is about 12050.7298119243. The cubic root of 145220089 is about 525.6244590617.

The spelling of 145220089 in words is "one hundred forty-five million, two hundred twenty thousand, eighty-nine".