1021540480743 has 4 divisors (see below), whose sum is σ = 1362053974328. Its totient is φ = 681026987160.

The previous prime is 1021540480739. The next prime is 1021540480757. The reversal of 1021540480743 is 3470840451201.

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

It is not a de Polignac number, because 1021540480743 - 2² = 1021540480739 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021540480733) 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, 170256746788 + ... + 170256746793.

It is an arithmetic number, because the mean of its divisors is an integer number (340513493582).

Almost surely, 2^{1021540480743} is an apocalyptic number.

1021540480743 is a deficient number, since it is larger than the sum of its proper divisors (340513493585).

1021540480743 is an equidigital number, since it uses as much as digits as its factorization.

1021540480743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340513493584.

The product of its (nonzero) digits is 107520, while the sum is 39.

The spelling of 1021540480743 in words is "one trillion, twenty-one billion, five hundred forty million, four hundred eighty thousand, seven hundred forty-three".