1240740123 has 48 divisors (see below), whose sum is σ = 1989225216. Its totient is φ = 685513920.

The previous prime is 1240740101. The next prime is 1240740161. The reversal of 1240740123 is 3210470421.

It is a happy number.

It is not a de Polignac number, because 1240740123 - 2¹² = 1240736027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1240740093 and 1240740102.

It is not an unprimeable number, because it can be changed into a prime (1240740023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 552040 + ... + 554282.

It is an arithmetic number, because the mean of its divisors is an integer number (41442192).

Almost surely, 2^1240740123 is an apocalyptic number.

1240740123 is a deficient number, since it is larger than the sum of its proper divisors (748485093).

1240740123 is a wasteful number, since it uses less digits than its factorization.

1240740123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2384 (or 2377 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 1240740123 is about 35224.1411960604. The cubic root of 1240740123 is about 1074.5507762118.

The spelling of 1240740123 in words is "one billion, two hundred forty million, seven hundred forty thousand, one hundred twenty-three".