123400258 has 4 divisors (see below), whose sum is σ = 185100390. Its totient is φ = 61700128.

The previous prime is 123400247. The next prime is 123400259. The reversal of 123400258 is 852004321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 65076489 + 58323769 = 8067^2 + 7637^2 .

It is not an unprimeable number, because it can be changed into a prime (123400259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30850063 + ... + 30850066.

Almost surely, 2^123400258 is an apocalyptic number.

123400258 is a deficient number, since it is larger than the sum of its proper divisors (61700132).

123400258 is an equidigital number, since it uses as much as digits as its factorization.

123400258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61700131.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 123400258 is about 11108.5668742642. The cubic root of 123400258 is about 497.8578461269.

Adding to 123400258 its reverse (852004321), we get a palindrome (975404579).

The spelling of 123400258 in words is "one hundred twenty-three million, four hundred thousand, two hundred fifty-eight".