145671985 has 8 divisors (see below), whose sum is σ = 175453056. Its totient is φ = 116106480.

The previous prime is 145671983. The next prime is 145671991. The reversal of 145671985 is 589176541.

145671985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 145671985 - 2¹ = 145671983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145671983) 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, 52399 + ... + 55108.

It is an arithmetic number, because the mean of its divisors is an integer number (21931632).

Almost surely, 2^145671985 is an apocalyptic number.

It is an amenable number.

145671985 is a deficient number, since it is larger than the sum of its proper divisors (29781071).

145671985 is a wasteful number, since it uses less digits than its factorization.

145671985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107783.

The product of its digits is 302400, while the sum is 46.

The square root of 145671985 is about 12069.4649839999. The cubic root of 145671985 is about 526.1691073899.

It can be divided in two parts, 1456 and 71985, that added together give a square (73441 = 271²).

The spelling of 145671985 in words is "one hundred forty-five million, six hundred seventy-one thousand, nine hundred eighty-five".