123040 has 24 divisors (see below), whose sum is σ = 291060. Its totient is φ = 49152.

The previous prime is 123031. The next prime is 123049. The reversal of 123040 is 40321.

It is an interprime number because it is at equal distance from previous prime (123031) and next prime (123049).

It can be written as a sum of positive squares in 2 ways, for example, as 121104 + 1936 = 348^2 + 44^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (123049) 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, 225 + ... + 544.

2¹²³⁰⁴⁰ is an apocalyptic number.

123040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123040 is an abundant number, since it is smaller than the sum of its proper divisors (168020).

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

123040 is an equidigital number, since it uses as much as digits as its factorization.

123040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784 (or 776 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 123040 is about 350.7705802943. The cubic root of 123040 is about 49.7372887401.

Adding to 123040 its reverse (40321), we get a palindrome (163361).

The spelling of 123040 in words is "one hundred twenty-three thousand, forty", and thus it is an iban number.