124196821 has 24 divisors (see below), whose sum is σ = 151683840. Its totient is φ = 101253600.

The previous prime is 124196791. The next prime is 124196833. The reversal of 124196821 is 128691421.

It is a happy number.

It is not a de Polignac number, because 124196821 - 2⁷ = 124196693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124196321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100276 + ... + 101506.

It is an arithmetic number, because the mean of its divisors is an integer number (6320160).

Almost surely, 2^124196821 is an apocalyptic number.

It is an amenable number.

124196821 is a deficient number, since it is larger than the sum of its proper divisors (27487019).

124196821 is a wasteful number, since it uses less digits than its factorization.

124196821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345 (or 1338 counting only the distinct ones).

The product of its digits is 6912, while the sum is 34.

The square root of 124196821 is about 11144.3627453525. The cubic root of 124196821 is about 498.9267927673.

The spelling of 124196821 in words is "one hundred twenty-four million, one hundred ninety-six thousand, eight hundred twenty-one".