123420455 has 16 divisors (see below), whose sum is σ = 156619008. Its totient is φ = 93216000.

The previous prime is 123420439. The next prime is 123420469. The reversal of 123420455 is 554024321.

It is a happy number.

It is not a de Polignac number, because 123420455 - 2⁴ = 123420439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3356 + ... + 16065.

It is an arithmetic number, because the mean of its divisors is an integer number (9788688).

Almost surely, 2^123420455 is an apocalyptic number.

123420455 is a deficient number, since it is larger than the sum of its proper divisors (33198553).

123420455 is a wasteful number, since it uses less digits than its factorization.

123420455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19498.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 123420455 is about 11109.4759102309. The cubic root of 123420455 is about 497.8850062170.

Adding to 123420455 its reverse (554024321), we get a palindrome (677444776).

The spelling of 123420455 in words is "one hundred twenty-three million, four hundred twenty thousand, four hundred fifty-five".