124649 has 4 divisors (see below), whose sum is σ = 142464. Its totient is φ = 106836.

The previous prime is 124643. The next prime is 124669. The reversal of 124649 is 946421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 124649 - 2⁴ = 124633 is a prime.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (124643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8897 + ... + 8910.

It is an arithmetic number, because the mean of its divisors is an integer number (35616).

2¹²⁴⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

124649 is a deficient number, since it is larger than the sum of its proper divisors (17815).

124649 is an equidigital number, since it uses as much as digits as its factorization.

124649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17814.

The product of its digits is 1728, while the sum is 26.

The square root of 124649 is about 353.0566526777. The cubic root of 124649 is about 49.9531561267.

The spelling of 124649 in words is "one hundred twenty-four thousand, six hundred forty-nine".