124640161 has 8 divisors (see below), whose sum is σ = 129280104. Its totient is φ = 120067200.

The previous prime is 124640147. The next prime is 124640177. The reversal of 124640161 is 161046421.

It can be written as a sum of positive squares in 4 ways, for example, as 49280400 + 75359761 = 7020^2 + 8681^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 124640161 - 2⁵ = 124640129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124643161) 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 7 ways as a sum of consecutive naturals, for example, 12940 + ... + 20413.

It is an arithmetic number, because the mean of its divisors is an integer number (16160013).

Almost surely, 2^124640161 is an apocalyptic number.

It is an amenable number.

124640161 is a deficient number, since it is larger than the sum of its proper divisors (4639943).

124640161 is a wasteful number, since it uses less digits than its factorization.

124640161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33491.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 124640161 is about 11164.2358000895. The cubic root of 124640161 is about 499.5197535410.

Adding to 124640161 its reverse (161046421), we get a palindrome (285686582).

The spelling of 124640161 in words is "one hundred twenty-four million, six hundred forty thousand, one hundred sixty-one".