123421524 has 48 divisors (see below), whose sum is σ = 300307392. Its totient is φ = 39416832.

The previous prime is 123421523. The next prime is 123421541. The reversal of 123421524 is 425124321.

It is a junction number, because it is equal to n+sod(n) for n = 123421494 and 123421503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123421523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25092 + ... + 29604.

It is an arithmetic number, because the mean of its divisors is an integer number (6256404).

Almost surely, 2^123421524 is an apocalyptic number.

It is an amenable number.

123421524 is an abundant number, since it is smaller than the sum of its proper divisors (176885868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123421524 is a wasteful number, since it uses less digits than its factorization.

123421524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4616 (or 4614 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 123421524 is about 11109.5240222073. The cubic root of 123421524 is about 497.8864436814.

Adding to 123421524 its reverse (425124321), we get a palindrome (548545845).

The spelling of 123421524 in words is "one hundred twenty-three million, four hundred twenty-one thousand, five hundred twenty-four".