123742563 has 32 divisors (see below), whose sum is σ = 192844800. Its totient is φ = 69121920.

The previous prime is 123742561. The next prime is 123742579. The reversal of 123742563 is 365247321.

It is not a de Polignac number, because 123742563 - 2¹ = 123742561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123742561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 221881 + ... + 222437.

It is an arithmetic number, because the mean of its divisors is an integer number (6026400).

Almost surely, 2^123742563 is an apocalyptic number.

123742563 is a deficient number, since it is larger than the sum of its proper divisors (69102237).

123742563 is a wasteful number, since it uses less digits than its factorization.

123742563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787.

The product of its digits is 30240, while the sum is 33.

The square root of 123742563 is about 11123.9634573294. The cubic root of 123742563 is about 498.3177638438.

Adding to 123742563 its reverse (365247321), we get a palindrome (488989884).

The spelling of 123742563 in words is "one hundred twenty-three million, seven hundred forty-two thousand, five hundred sixty-three".