149645 has 6 divisors (see below), whose sum is σ = 180618. Its totient is φ = 119024.

The previous prime is 149629. The next prime is 149689. The reversal of 149645 is 546941.

It can be written as a sum of positive squares in 3 ways, for example, as 77284 + 72361 = 278^2 + 269^2 .

It is not a de Polignac number, because 149645 - 2⁴ = 149629 is a prime.

It is a super-3 number, since 3×149645³ = 10053282499533375, which contains 333 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 149645.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 779 + ... + 951.

It is an arithmetic number, because the mean of its divisors is an integer number (30103).

2¹⁴⁹⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

149645 is a deficient number, since it is larger than the sum of its proper divisors (30973).

149645 is an frugal number, since it uses more digits than its factorization.

149645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351 (or 178 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 149645 is about 386.8397601075. The cubic root of 149645 is about 53.0909793716.

The spelling of 149645 in words is "one hundred forty-nine thousand, six hundred forty-five".