123400654 has 16 divisors (see below), whose sum is σ = 211066128. Its totient is φ = 53603712.

The previous prime is 123400643. The next prime is 123400657. The reversal of 123400654 is 456004321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123400657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139152 + ... + 140035.

It is an arithmetic number, because the mean of its divisors is an integer number (13191633).

Almost surely, 2^123400654 is an apocalyptic number.

123400654 is a deficient number, since it is larger than the sum of its proper divisors (87665474).

123400654 is a wasteful number, since it uses less digits than its factorization.

123400654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279219.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 123400654 is about 11108.5846983313. The cubic root of 123400654 is about 497.8583786798.

Adding to 123400654 its reverse (456004321), we get a palindrome (579404975).

The spelling of 123400654 in words is "one hundred twenty-three million, four hundred thousand, six hundred fifty-four".