123134240 has 24 divisors (see below), whose sum is σ = 290905020. Its totient is φ = 49253632.

The previous prime is 123134237. The next prime is 123134243. The reversal of 123134240 is 42431321.

It is an interprime number because it is at equal distance from previous prime (123134237) and next prime (123134243).

It can be written as a sum of positive squares in 2 ways, for example, as 122500624 + 633616 = 11068^2 + 796^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (123134243) 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, 384635 + ... + 384954.

Almost surely, 2^123134240 is an apocalyptic number.

123134240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123134240 is an abundant number, since it is smaller than the sum of its proper divisors (167770780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123134240 is an equidigital number, since it uses as much as digits as its factorization.

123134240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769604 (or 769596 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 123134240 is about 11096.5868626348. The cubic root of 123134240 is about 497.4998392296.

Adding to 123134240 its reverse (42431321), we get a palindrome (165565561).

The spelling of 123134240 in words is "one hundred twenty-three million, one hundred thirty-four thousand, two hundred forty".