1240123005 has 48 divisors (see below), whose sum is σ = 2347937280. Its totient is φ = 600508800.

The previous prime is 1240122997. The next prime is 1240123009. The reversal of 1240123005 is 5003210421.

It is not a de Polignac number, because 1240123005 - 2³ = 1240122997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240123009) 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, 711435 + ... + 713175.

It is an arithmetic number, because the mean of its divisors is an integer number (48915360).

Almost surely, 2^1240123005 is an apocalyptic number.

1240123005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1240123005 is a deficient number, since it is larger than the sum of its proper divisors (1107814275).

1240123005 is a wasteful number, since it uses less digits than its factorization.

1240123005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202 (or 3199 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1240123005 is about 35215.3802336422. The cubic root of 1240123005 is about 1074.3725936938.

Adding to 1240123005 its reverse (5003210421), we get a palindrome (6243333426).

The spelling of 1240123005 in words is "one billion, two hundred forty million, one hundred twenty-three thousand, five".