123007240 has 64 divisors (see below), whose sum is σ = 301028400. Its totient is φ = 45047808.

The previous prime is 123007229. The next prime is 123007249. The reversal of 123007240 is 42700321.

It can be written as a sum of positive squares in 8 ways, for example, as 106213636 + 16793604 = 10306^2 + 4098^2 .

It is not an unprimeable number, because it can be changed into a prime (123007249) 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, 22716 + ... + 27604.

Almost surely, 2^123007240 is an apocalyptic number.

123007240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123007240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150514200).

123007240 is an abundant number, since it is smaller than the sum of its proper divisors (178021160).

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

123007240 is a wasteful number, since it uses less digits than its factorization.

123007240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4954 (or 4950 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 123007240 is about 11090.8629060141. The cubic root of 123007240 is about 497.3287408304.

Adding to 123007240 its reverse (42700321), we get a palindrome (165707561).

The spelling of 123007240 in words is "one hundred twenty-three million, seven thousand, two hundred forty".