124404641243161 has 4 divisors (see below), whose sum is σ = 124404667846324. Its totient is φ = 124404614640000.

The previous prime is 124404641243147. The next prime is 124404641243173. The reversal of 124404641243161 is 161342146404421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80526735321561 + 43877905921600 = 8973669^2 + 6624040^2 .

It is a cyclic number.

It is not a de Polignac number, because 124404641243161 - 2¹¹ = 124404641241113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124404641243101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4220580 + ... + 16328581.

It is an arithmetic number, because the mean of its divisors is an integer number (31101166961581).

Almost surely, 2^{124404641243161} is an apocalyptic number.

It is an amenable number.

124404641243161 is a deficient number, since it is larger than the sum of its proper divisors (26603163).

124404641243161 is an equidigital number, since it uses as much as digits as its factorization.

124404641243161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26603162.

The product of its (nonzero) digits is 442368, while the sum is 43.

Adding to 124404641243161 its reverse (161342146404421), we get a palindrome (285746787647582).

The spelling of 124404641243161 in words is "one hundred twenty-four trillion, four hundred four billion, six hundred forty-one million, two hundred forty-three thousand, one hundred sixty-one".