145540689 has 24 divisors (see below), whose sum is σ = 235599168. Its totient is φ = 78270720.

The previous prime is 145540687. The next prime is 145540739. The reversal of 145540689 is 986045541.

It is not a de Polignac number, because 145540689 - 2¹ = 145540687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145540689.

It is not an unprimeable number, because it can be changed into a prime (145540687) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5922 + ... + 18059.

It is an arithmetic number, because the mean of its divisors is an integer number (9816632).

Almost surely, 2^145540689 is an apocalyptic number.

It is an amenable number.

145540689 is a deficient number, since it is larger than the sum of its proper divisors (90058479).

145540689 is a wasteful number, since it uses less digits than its factorization.

145540689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24025 (or 24008 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 145540689 is about 12064.0245772296. The cubic root of 145540689 is about 526.0109789185.

The spelling of 145540689 in words is "one hundred forty-five million, five hundred forty thousand, six hundred eighty-nine".