1240245011 has 4 divisors (see below), whose sum is σ = 1240317624. Its totient is φ = 1240172400.

The previous prime is 1240244987. The next prime is 1240245037. The reversal of 1240245011 is 1105420421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1240245011 - 2¹⁸ = 1239982867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240245091) 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, 4916 + ... + 50046.

It is an arithmetic number, because the mean of its divisors is an integer number (310079406).

Almost surely, 2^1240245011 is an apocalyptic number.

1240245011 is a deficient number, since it is larger than the sum of its proper divisors (72613).

1240245011 is an equidigital number, since it uses as much as digits as its factorization.

1240245011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72612.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1240245011 is about 35217.1124739096. The cubic root of 1240245011 is about 1074.4078255764.

Adding to 1240245011 its reverse (1105420421), we get a palindrome (2345665432).

The spelling of 1240245011 in words is "one billion, two hundred forty million, two hundred forty-five thousand, eleven".