145223645 has 32 divisors (see below), whose sum is σ = 204083712. Its totient is φ = 97155072.

The previous prime is 145223629. The next prime is 145223653. The reversal of 145223645 is 546322541.

It is not a de Polignac number, because 145223645 - 2⁴ = 145223629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 288464 + ... + 288966.

It is an arithmetic number, because the mean of its divisors is an integer number (6377616).

Almost surely, 2^145223645 is an apocalyptic number.

It is an amenable number.

145223645 is a deficient number, since it is larger than the sum of its proper divisors (58860067).

145223645 is a wasteful number, since it uses less digits than its factorization.

145223645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701.

The product of its digits is 28800, while the sum is 32.

The square root of 145223645 is about 12050.8773539523. The cubic root of 145223645 is about 525.6287493435.

The spelling of 145223645 in words is "one hundred forty-five million, two hundred twenty-three thousand, six hundred forty-five".