123420603 has 4 divisors (see below), whose sum is σ = 164560808. Its totient is φ = 82280400.

The previous prime is 123420559. The next prime is 123420611. The reversal of 123420603 is 306024321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 306024321 = 3 ⋅102008107.

It is not a de Polignac number, because 123420603 - 2⁸ = 123420347 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123420603.

It is not an unprimeable number, because it can be changed into a prime (123420203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20570098 + ... + 20570103.

It is an arithmetic number, because the mean of its divisors is an integer number (41140202).

Almost surely, 2^123420603 is an apocalyptic number.

123420603 is a deficient number, since it is larger than the sum of its proper divisors (41140205).

123420603 is an equidigital number, since it uses as much as digits as its factorization.

123420603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41140204.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 123420603 is about 11109.4825712092. The cubic root of 123420603 is about 497.8852052303.

Adding to 123420603 its reverse (306024321), we get a palindrome (429444924).

The spelling of 123420603 in words is "one hundred twenty-three million, four hundred twenty thousand, six hundred three".