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124981 is a prime number
BaseRepresentation
bin11110100000110101
320100102221
4132200311
512444411
62402341
71030243
oct364065
9210387
10124981
118599a
12603b1
1344b6c
1433793
1527071
hex1e835

124981 has 2 divisors, whose sum is σ = 124982. Its totient is φ = 124980.

The previous prime is 124979. The next prime is 124987. The reversal of 124981 is 189421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70225 + 54756 = 265^2 + 234^2 .

It is an emirp because it is prime and its reverse (189421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 124981 - 21 = 124979 is a prime.

It is a super-2 number, since 2×1249812 = 31240500722, which contains 22 as substring.

Together with 124979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62490 + 62491.

It is an arithmetic number, because the mean of its divisors is an integer number (62491).

2124981 is an apocalyptic number.

It is an amenable number.

124981 is a deficient number, since it is larger than the sum of its proper divisors (1).

124981 is an equidigital number, since it uses as much as digits as its factorization.

124981 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 124981 is about 353.5265195144. The cubic root of 124981 is about 49.9974665383.

The spelling of 124981 in words is "one hundred twenty-four thousand, nine hundred eighty-one".