1405520240343 has 4 divisors (see below), whose sum is σ = 1874026987128. Its totient is φ = 937013493560.

The previous prime is 1405520240287. The next prime is 1405520240429. The reversal of 1405520240343 is 3430420255041.

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

It is a cyclic number.

It is not a de Polignac number, because 1405520240343 - 2⁶ = 1405520240279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405520240143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234253373388 + ... + 234253373393.

It is an arithmetic number, because the mean of its divisors is an integer number (468506746782).

Almost surely, 2^{1405520240343} is an apocalyptic number.

1405520240343 is a deficient number, since it is larger than the sum of its proper divisors (468506746785).

1405520240343 is an equidigital number, since it uses as much as digits as its factorization.

1405520240343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468506746784.

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 1405520240343 its reverse (3430420255041), we get a palindrome (4835940495384).

The spelling of 1405520240343 in words is "one trillion, four hundred five billion, five hundred twenty million, two hundred forty thousand, three hundred forty-three".