1240403011 has 8 divisors (see below), whose sum is σ = 1382492880. Its totient is φ = 1105993728.

The previous prime is 1240403009. The next prime is 1240403023. The reversal of 1240403011 is 1103040421.

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 1240403011 - 2¹ = 1240403009 is a prime.

It is a super-2 number, since 2×1240403011² = 3077199259395732242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240403071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1919806 + ... + 1920451.

It is an arithmetic number, because the mean of its divisors is an integer number (172811610).

Almost surely, 2^1240403011 is an apocalyptic number.

1240403011 is a deficient number, since it is larger than the sum of its proper divisors (142089869).

1240403011 is a wasteful number, since it uses less digits than its factorization.

1240403011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3840293.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1240403011 is about 35219.3556301077. The cubic root of 1240403011 is about 1074.4534480748.

Adding to 1240403011 its reverse (1103040421), we get a palindrome (2343443432).

The spelling of 1240403011 in words is "one billion, two hundred forty million, four hundred three thousand, eleven".