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148081 = 373397
BaseRepresentation
bin100100001001110001
321112010111
4210021301
514214311
63101321
71154503
oct441161
9245114
10148081
11a128a
1271841
135252b
143bd73
152dd21
hex24271

148081 has 4 divisors (see below), whose sum is σ = 148852. Its totient is φ = 147312.

The previous prime is 148079. The next prime is 148091. The reversal of 148081 is 180841.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 180841 = 193937.

It can be written as a sum of positive squares in 2 ways, for example, as 90000 + 58081 = 300^2 + 241^2 .

It is a cyclic number.

It is not a de Polignac number, because 148081 - 21 = 148079 is a prime.

It is a super-2 number, since 2×1480812 = 43855965122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148021) 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, 175 + ... + 571.

It is an arithmetic number, because the mean of its divisors is an integer number (37213).

2148081 is an apocalyptic number.

It is an amenable number.

148081 is a deficient number, since it is larger than the sum of its proper divisors (771).

148081 is an equidigital number, since it uses as much as digits as its factorization.

148081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 148081 is about 384.8129415703. The cubic root of 148081 is about 52.9053728628.

The spelling of 148081 in words is "one hundred forty-eight thousand, eighty-one".

Divisors: 1 373 397 148081