124225421 has 4 divisors (see below), whose sum is σ = 124480992. Its totient is φ = 123969852.

The previous prime is 124225411. The next prime is 124225427. The reversal of 124225421 is 124522421.

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, and also an emirpimes, since its reverse is a distinct semiprime: 124522421 = 1669 ⋅74609.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124225421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124225427) 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, 127055 + ... + 128028.

It is an arithmetic number, because the mean of its divisors is an integer number (31120248).

Almost surely, 2^124225421 is an apocalyptic number.

It is an amenable number.

124225421 is a deficient number, since it is larger than the sum of its proper divisors (255571).

124225421 is an equidigital number, since it uses as much as digits as its factorization.

124225421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255570.

The product of its digits is 1280, while the sum is 23.

The square root of 124225421 is about 11145.6458314447. The cubic root of 124225421 is about 498.9650873897.

Adding to 124225421 its reverse (124522421), we get a palindrome (248747842).

The spelling of 124225421 in words is "one hundred twenty-four million, two hundred twenty-five thousand, four hundred twenty-one".