149661 has 16 divisors (see below), whose sum is σ = 232320. Its totient is φ = 95040.

The previous prime is 149629. The next prime is 149689. The reversal of 149661 is 166941.

It is not a de Polignac number, because 149661 - 2⁵ = 149629 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

149661 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 501 + ... + 741.

It is an arithmetic number, because the mean of its divisors is an integer number (14520).

2¹⁴⁹⁶⁶¹ is an apocalyptic number.

It is an amenable number.

149661 is a deficient number, since it is larger than the sum of its proper divisors (82659).

149661 is a wasteful number, since it uses less digits than its factorization.

149661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273 (or 267 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 149661 is about 386.8604399522. The cubic root of 149661 is about 53.0928714616.

It can be divided in two parts, 149 and 661, that multiplied together give a palindrome (98489).

The spelling of 149661 in words is "one hundred forty-nine thousand, six hundred sixty-one".