1240109506 has 8 divisors (see below), whose sum is σ = 1969585740. Its totient is φ = 583580928.

The previous prime is 1240109503. The next prime is 1240109509. The reversal of 1240109506 is 6059010421.

It is an interprime number because it is at equal distance from previous prime (1240109503) and next prime (1240109509).

It can be written as a sum of positive squares in 2 ways, for example, as 1238406481 + 1703025 = 35191^2 + 1305^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1240109503) 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, 18236871 + ... + 18236938.

Almost surely, 2^1240109506 is an apocalyptic number.

1240109506 is a deficient number, since it is larger than the sum of its proper divisors (729476234).

1240109506 is a wasteful number, since it uses less digits than its factorization.

1240109506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36473828.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1240109506 is about 35215.1885697067. The cubic root of 1240109506 is about 1074.3686954224.

Adding to 1240109506 its reverse (6059010421), we get a palindrome (7299119927).

The spelling of 1240109506 in words is "one billion, two hundred forty million, one hundred nine thousand, five hundred six".