145669985 has 8 divisors (see below), whose sum is σ = 174947136. Its totient is φ = 116440560.

The previous prime is 145669981. The next prime is 145670051. The reversal of 145669985 is 589966541.

It is a happy number.

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

It is not a de Polignac number, because 145669985 - 2² = 145669981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145669981) 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, 4829 + ... + 17738.

It is an arithmetic number, because the mean of its divisors is an integer number (21868392).

Almost surely, 2^145669985 is an apocalyptic number.

It is an amenable number.

145669985 is a deficient number, since it is larger than the sum of its proper divisors (29277151).

145669985 is a wasteful number, since it uses less digits than its factorization.

145669985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23863.

The product of its digits is 2332800, while the sum is 53.

The square root of 145669985 is about 12069.3821300015. The cubic root of 145669985 is about 526.1666993702.

The spelling of 145669985 in words is "one hundred forty-five million, six hundred sixty-nine thousand, nine hundred eighty-five".