1340303400542 has 4 divisors (see below), whose sum is σ = 2010455100816. Its totient is φ = 670151700270.

The previous prime is 1340303400533. The next prime is 1340303400559. The reversal of 1340303400542 is 2450043030431.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335075850134 + ... + 335075850137.

It is an arithmetic number, because the mean of its divisors is an integer number (502613775204).

Almost surely, 2^{1340303400542} is an apocalyptic number.

1340303400542 is a deficient number, since it is larger than the sum of its proper divisors (670151700274).

1340303400542 is an equidigital number, since it uses as much as digits as its factorization.

1340303400542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670151700273.

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 1340303400542 its reverse (2450043030431), we get a palindrome (3790346430973).

The spelling of 1340303400542 in words is "one trillion, three hundred forty billion, three hundred three million, four hundred thousand, five hundred forty-two".