1240340412405 has 8 divisors (see below), whose sum is σ = 1984544659872. Its totient is φ = 661514886608.

The previous prime is 1240340412401. The next prime is 1240340412407. The reversal of 1240340412405 is 5042140430421.

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 1240340412405 - 2² = 1240340412401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240340412401) 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, 41344680399 + ... + 41344680428.

It is an arithmetic number, because the mean of its divisors is an integer number (248068082484).

Almost surely, 2^{1240340412405} is an apocalyptic number.

1240340412405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1240340412405 is a deficient number, since it is larger than the sum of its proper divisors (744204247467).

1240340412405 is an equidigital number, since it uses as much as digits as its factorization.

1240340412405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82689360835.

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 1240340412405 its reverse (5042140430421), we get a palindrome (6282480842826).

The spelling of 1240340412405 in words is "one trillion, two hundred forty billion, three hundred forty million, four hundred twelve thousand, four hundred five".