123421355 has 8 divisors (see below), whose sum is σ = 148219200. Its totient is φ = 98661376.

The previous prime is 123421339. The next prime is 123421387. The reversal of 123421355 is 553124321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123421355 - 2⁴ = 123421339 is a prime.

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, 1715 + ... + 15804.

It is an arithmetic number, because the mean of its divisors is an integer number (18527400).

Almost surely, 2^123421355 is an apocalyptic number.

123421355 is a deficient number, since it is larger than the sum of its proper divisors (24797845).

123421355 is a wasteful number, since it uses less digits than its factorization.

123421355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18933.

The product of its digits is 3600, while the sum is 26.

The square root of 123421355 is about 11109.5164161182. The cubic root of 123421355 is about 497.8862164308.

Adding to 123421355 its reverse (553124321), we get a palindrome (676545676).

The spelling of 123421355 in words is "one hundred twenty-three million, four hundred twenty-one thousand, three hundred fifty-five".