124720642 has 8 divisors (see below), whose sum is σ = 187172496. Its totient is φ = 62329812.

The previous prime is 124720637. The next prime is 124720681. The reversal of 124720642 is 246027421.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 124720642.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9748 + ... + 18559.

It is an arithmetic number, because the mean of its divisors is an integer number (23396562).

Almost surely, 2^124720642 is an apocalyptic number.

124720642 is a deficient number, since it is larger than the sum of its proper divisors (62451854).

124720642 is a wasteful number, since it uses less digits than its factorization.

124720642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30512.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 124720642 is about 11167.8396299374. The cubic root of 124720642 is about 499.6272448429.

The spelling of 124720642 in words is "one hundred twenty-four million, seven hundred twenty thousand, six hundred forty-two".