148121 has 4 divisors (see below), whose sum is σ = 156852. Its totient is φ = 139392.

The previous prime is 148091. The next prime is 148123. The reversal of 148121 is 121841.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 132496 + 15625 = 364^2 + 125^2 .

It is a cyclic number.

It is not a de Polignac number, because 148121 - 2¹⁰ = 147097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 8713 = 148121 / (1 + 4 + 8 + 1 + 2 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 148121.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 148121.

It is not an unprimeable number, because it can be changed into a prime (148123) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4340 + ... + 4373.

It is an arithmetic number, because the mean of its divisors is an integer number (39213).

2¹⁴⁸¹²¹ is an apocalyptic number.

It is an amenable number.

148121 is a deficient number, since it is larger than the sum of its proper divisors (8731).

148121 is an equidigital number, since it uses as much as digits as its factorization.

148121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8730.

The product of its digits is 64, while the sum is 17.

The square root of 148121 is about 384.8649113650. The cubic root of 148121 is about 52.9101360766.

Adding to 148121 its reverse (121841), we get a palindrome (269962).

The spelling of 148121 in words is "one hundred forty-eight thousand, one hundred twenty-one".