123451603 has 16 divisors (see below), whose sum is σ = 148801536. Its totient is φ = 101031040.

The previous prime is 123451591. The next prime is 123451613. The reversal of 123451603 is 306154321.

It is not a de Polignac number, because 123451603 - 2¹⁷ = 123320531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123451613) 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 15 ways as a sum of consecutive naturals, for example, 10051 + ... + 18652.

It is an arithmetic number, because the mean of its divisors is an integer number (9300096).

Almost surely, 2^123451603 is an apocalyptic number.

123451603 is a deficient number, since it is larger than the sum of its proper divisors (25349933).

123451603 is a wasteful number, since it uses less digits than its factorization.

123451603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28754.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 123451603 is about 11110.8776881037. The cubic root of 123451603 is about 497.9268869510.

The spelling of 123451603 in words is "one hundred twenty-three million, four hundred fifty-one thousand, six hundred three".