1240345406 has 32 divisors (see below), whose sum is σ = 1945278720. Its totient is φ = 592675776.

The previous prime is 1240345361. The next prime is 1240345411. The reversal of 1240345406 is 6045430421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 961610 + ... + 962898.

It is an arithmetic number, because the mean of its divisors is an integer number (60789960).

Almost surely, 2^1240345406 is an apocalyptic number.

1240345406 is a deficient number, since it is larger than the sum of its proper divisors (704933314).

1240345406 is a wasteful number, since it uses less digits than its factorization.

1240345406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 1240345406 is about 35218.5378174620. The cubic root of 1240345406 is about 1074.4368150804.

Adding to 1240345406 its reverse (6045430421), we get a palindrome (7285775827).

The spelling of 1240345406 in words is "one billion, two hundred forty million, three hundred forty-five thousand, four hundred six".