149121 has 20 divisors (see below), whose sum is σ = 255552. Its totient is φ = 84888.

The previous prime is 149119. The next prime is 149143. The reversal of 149121 is 121941.

It is not a de Polignac number, because 149121 - 2¹ = 149119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 149094 and 149103.

It is not an unprimeable number, because it can be changed into a prime (149101) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 436 + ... + 698.

2¹⁴⁹¹²¹ is an apocalyptic number.

It is an amenable number.

149121 is a deficient number, since it is larger than the sum of its proper divisors (106431).

149121 is an equidigital number, since it uses as much as digits as its factorization.

149121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 273 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 149121 is about 386.1618831526. The cubic root of 149121 is about 53.0289387470.

The spelling of 149121 in words is "one hundred forty-nine thousand, one hundred twenty-one".