124546645421 has 4 divisors (see below), whose sum is σ = 135869067744. Its totient is φ = 113224223100.

The previous prime is 124546645409. The next prime is 124546645423.

124546645421 is nontrivially palindromic in base 10.

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 124546645421 - 2⁶ = 124546645357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124546645423) 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, 5661211145 + ... + 5661211166.

It is an arithmetic number, because the mean of its divisors is an integer number (33967266936).

Almost surely, 2^124546645421 is an apocalyptic number.

124546645421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

124546645421 is a deficient number, since it is larger than the sum of its proper divisors (11322422323).

124546645421 is a wasteful number, since it uses less digits than its factorization.

124546645421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11322422322.

The product of its digits is 921600, while the sum is 44.

It can be divided in two parts, 124546 and 645421, that added together give a palindrome (769967).

The spelling of 124546645421 in words is "one hundred twenty-four billion, five hundred forty-six million, six hundred forty-five thousand, four hundred twenty-one".