145731589 has 8 divisors (see below), whose sum is σ = 154103040. Its totient is φ = 137589600.

The previous prime is 145731571. The next prime is 145731629. The reversal of 145731589 is 985137541.

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

It is a cyclic number.

It is not a de Polignac number, because 145731589 - 2¹⁷ = 145600517 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 (145731559) 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, 56059 + ... + 58600.

It is an arithmetic number, because the mean of its divisors is an integer number (19262880).

Almost surely, 2^145731589 is an apocalyptic number.

It is an amenable number.

145731589 is a deficient number, since it is larger than the sum of its proper divisors (8371451).

145731589 is a wasteful number, since it uses less digits than its factorization.

145731589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114731.

The product of its digits is 151200, while the sum is 43.

The square root of 145731589 is about 12071.9339378577. The cubic root of 145731589 is about 526.2408610792.

The spelling of 145731589 in words is "one hundred forty-five million, seven hundred thirty-one thousand, five hundred eighty-nine".