1240907473 has 4 divisors (see below), whose sum is σ = 1336361908. Its totient is φ = 1145453040.

The previous prime is 1240907471. The next prime is 1240907527. The reversal of 1240907473 is 3747090421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 854509824 + 386397649 = 29232^2 + 19657^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240907473 - 2¹ = 1240907471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240907471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47727198 + ... + 47727223.

It is an arithmetic number, because the mean of its divisors is an integer number (334090477).

Almost surely, 2^1240907473 is an apocalyptic number.

1240907473 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1240907473 is a deficient number, since it is larger than the sum of its proper divisors (95454435).

1240907473 is an equidigital number, since it uses as much as digits as its factorization.

1240907473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95454434.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 1240907473 is about 35226.5166174574. The cubic root of 1240907473 is about 1074.5990855460.

Adding to 1240907473 its reverse (3747090421), we get a palindrome (4987997894).

The spelling of 1240907473 in words is "one billion, two hundred forty million, nine hundred seven thousand, four hundred seventy-three".