148921 has 2 divisors, whose sum is σ = 148922. Its totient is φ = 148920.
The previous prime is 148913. The next prime is 148927. The reversal of 148921 is 129841.
It is a happy number.
148921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 129600 + 19321 = 360^2 + 139^2 .
It is an emirp because it is prime and its reverse (129841) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 148921 - 23 = 148913 is a prime.
148921 is a lucky number.
It is a nialpdrome in base 12.
It is not a weakly prime, because it can be changed into another prime (148927) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74460 + 74461.
It is an arithmetic number, because the mean of its divisors is an integer number (74461).
2148921 is an apocalyptic number.
It is an amenable number.
148921 is a deficient number, since it is larger than the sum of its proper divisors (1).
148921 is an equidigital number, since it uses as much as digits as its factorization.
148921 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 576, while the sum is 25.
The square root of 148921 is about 385.9028375122. The cubic root of 148921 is about 53.0052207982.
The spelling of 148921 in words is "one hundred forty-eight thousand, nine hundred twenty-one".
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