123532478 has 4 divisors (see below), whose sum is σ = 185298720. Its totient is φ = 61766238.

The previous prime is 123532477. The next prime is 123532483. The reversal of 123532478 is 874235321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 874235321 = 617 ⋅1416913.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123532477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30883118 + ... + 30883121.

It is an arithmetic number, because the mean of its divisors is an integer number (46324680).

Almost surely, 2^123532478 is an apocalyptic number.

123532478 is a deficient number, since it is larger than the sum of its proper divisors (61766242).

123532478 is an equidigital number, since it uses as much as digits as its factorization.

123532478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61766241.

The product of its digits is 40320, while the sum is 35.

The square root of 123532478 is about 11114.5165436919. The cubic root of 123532478 is about 498.0355963438.

Adding to 123532478 its reverse (874235321), we get a palindrome (997767799).

The spelling of 123532478 in words is "one hundred twenty-three million, five hundred thirty-two thousand, four hundred seventy-eight".