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149971 is a prime number
BaseRepresentation
bin100100100111010011
321121201111
4210213103
514244341
63114151
71163143
oct444723
9247644
10149971
11a2748
1272957
1353353
143c923
152e681
hex249d3

149971 has 2 divisors, whose sum is σ = 149972. Its totient is φ = 149970.

The previous prime is 149969. The next prime is 149993. The reversal of 149971 is 179941.

149971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 149971 - 21 = 149969 is a prime.

Together with 149969, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (149911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74985 + 74986.

It is an arithmetic number, because the mean of its divisors is an integer number (74986).

2149971 is an apocalyptic number.

149971 is a deficient number, since it is larger than the sum of its proper divisors (1).

149971 is an equidigital number, since it uses as much as digits as its factorization.

149971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 31.

The square root of 149971 is about 387.2608939720. The cubic root of 149971 is about 53.1295041164.

The spelling of 149971 in words is "one hundred forty-nine thousand, nine hundred seventy-one".