123421053 has 12 divisors (see below), whose sum is σ = 191428800. Its totient is φ = 70526232.

The previous prime is 123421033. The next prime is 123421063. The reversal of 123421053 is 350124321.

It is not a de Polignac number, because 123421053 - 2¹⁶ = 123355517 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123421033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 419653 + ... + 419946.

It is an arithmetic number, because the mean of its divisors is an integer number (15952400).

Almost surely, 2^123421053 is an apocalyptic number.

It is an amenable number.

123421053 is a deficient number, since it is larger than the sum of its proper divisors (68007747).

123421053 is an equidigital number, since it uses as much as digits as its factorization.

123421053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839616 (or 839609 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 123421053 is about 11109.5028241591. The cubic root of 123421053 is about 497.8858103375.

Adding to 123421053 its reverse (350124321), we get a palindrome (473545374).

The spelling of 123421053 in words is "one hundred twenty-three million, four hundred twenty-one thousand, fifty-three".