1240345407 has 16 divisors (see below), whose sum is σ = 1936150272. Its totient is φ = 691481280.

The previous prime is 1240345361. The next prime is 1240345411. The reversal of 1240345407 is 7045430421.

It is not a de Polignac number, because 1240345407 - 2¹¹ = 1240343359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240345427) 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 15 ways as a sum of consecutive naturals, for example, 719433 + ... + 721154.

It is an arithmetic number, because the mean of its divisors is an integer number (121009392).

Almost surely, 2^1240345407 is an apocalyptic number.

1240345407 is a deficient number, since it is larger than the sum of its proper divisors (695804865).

1240345407 is a wasteful number, since it uses less digits than its factorization.

1240345407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440638.

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 1240345407 is about 35218.5378316591. The cubic root of 1240345407 is about 1074.4368153692.

Adding to 1240345407 its reverse (7045430421), we get a palindrome (8285775828).

The spelling of 1240345407 in words is "one billion, two hundred forty million, three hundred forty-five thousand, four hundred seven".