123400254 has 16 divisors (see below), whose sum is σ = 253471248. Its totient is φ = 40021632.

The previous prime is 123400247. The next prime is 123400259. The reversal of 123400254 is 452004321.

It is a self number, because there is not a number n which added to its sum of digits gives 123400254.

It is a congruent number.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277707 + ... + 278150.

It is an arithmetic number, because the mean of its divisors is an integer number (15841953).

Almost surely, 2^123400254 is an apocalyptic number.

123400254 is an abundant number, since it is smaller than the sum of its proper divisors (130070994).

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

123400254 is a wasteful number, since it uses less digits than its factorization.

123400254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555899.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 123400254 is about 11108.5666942230. The cubic root of 123400254 is about 497.8578407475.

Adding to 123400254 its reverse (452004321), we get a palindrome (575404575).

The spelling of 123400254 in words is "one hundred twenty-three million, four hundred thousand, two hundred fifty-four".