1240423445 has 8 divisors (see below), whose sum is σ = 1576067544. Its totient is φ = 933965824.

The previous prime is 1240423441. The next prime is 1240423447. The reversal of 1240423445 is 5443240421.

It can be written as a sum of positive squares in 4 ways, for example, as 344139601 + 896283844 = 18551^2 + 29938^2 .

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 1240423445 - 2² = 1240423441 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240423441) 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, 7296524 + ... + 7296693.

It is an arithmetic number, because the mean of its divisors is an integer number (197008443).

Almost surely, 2^1240423445 is an apocalyptic number.

It is an amenable number.

1240423445 is a deficient number, since it is larger than the sum of its proper divisors (335644099).

1240423445 is a wasteful number, since it uses less digits than its factorization.

1240423445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14593239.

The product of its (nonzero) digits is 15360, while the sum is 29.

The square root of 1240423445 is about 35219.6457250779. The cubic root of 1240423445 is about 1074.4593481092.

Adding to 1240423445 its reverse (5443240421), we get a palindrome (6683663866).

The spelling of 1240423445 in words is "one billion, two hundred forty million, four hundred twenty-three thousand, four hundred forty-five".