1240102009 has 8 divisors (see below), whose sum is σ = 1314788328. Its totient is φ = 1165608960.

The previous prime is 1240101997. The next prime is 1240102033. The reversal of 1240102009 is 9002010421.

It can be written as a sum of positive squares in 4 ways, for example, as 6125625 + 1233976384 = 2475^2 + 35128^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1240102009 - 2²¹ = 1238004857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240102079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34992 + ... + 60865.

It is an arithmetic number, because the mean of its divisors is an integer number (164348541).

Almost surely, 2^1240102009 is an apocalyptic number.

It is an amenable number.

1240102009 is a deficient number, since it is larger than the sum of its proper divisors (74686319).

1240102009 is an equidigital number, since it uses as much as digits as its factorization.

1240102009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96635.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1240102009 is about 35215.0821239991. The cubic root of 1240102009 is about 1074.3665304097.

The spelling of 1240102009 in words is "one billion, two hundred forty million, one hundred two thousand, nine".