123011403 has 16 divisors (see below), whose sum is σ = 165468576. Its totient is φ = 81285120.

The previous prime is 123011381. The next prime is 123011407. The reversal of 123011403 is 304110321.

It is a de Polignac number, because none of the positive numbers 2^k-123011403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123011407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283875 + ... + 284307.

It is an arithmetic number, because the mean of its divisors is an integer number (10341786).

Almost surely, 2^123011403 is an apocalyptic number.

123011403 is a deficient number, since it is larger than the sum of its proper divisors (42457173).

123011403 is a wasteful number, since it uses less digits than its factorization.

123011403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 123011403 is about 11091.0505814373. The cubic root of 123011403 is about 497.3343512215.

Adding to 123011403 its reverse (304110321), we get a palindrome (427121724).

The spelling of 123011403 in words is "one hundred twenty-three million, eleven thousand, four hundred three".