123421436 has 24 divisors (see below), whose sum is σ = 222216960. Its totient is φ = 59950512.

The previous prime is 123421421. The next prime is 123421453. The reversal of 123421436 is 634124321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23771 + ... + 28493.

It is an arithmetic number, because the mean of its divisors is an integer number (9259040).

Almost surely, 2^123421436 is an apocalyptic number.

It is an amenable number.

123421436 is a deficient number, since it is larger than the sum of its proper divisors (98795524).

123421436 is a wasteful number, since it uses less digits than its factorization.

123421436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4913 (or 4911 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

The square root of 123421436 is about 11109.5200616408. The cubic root of 123421436 is about 497.8863253497.

Adding to 123421436 its reverse (634124321), we get a palindrome (757545757).

The spelling of 123421436 in words is "one hundred twenty-three million, four hundred twenty-one thousand, four hundred thirty-six".