1021540480739 has 2 divisors, whose sum is σ = 1021540480740. Its totient is φ = 1021540480738.

The previous prime is 1021540480733. The next prime is 1021540480757. The reversal of 1021540480739 is 9370840451201.

It is a weak prime.

It is an emirp because it is prime and its reverse (9370840451201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021540480739 is a prime.

It is a super-2 number, since 2×1021540480739² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1021540480739.

It is not a weakly prime, because it can be changed into another prime (1021540480733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510770240369 + 510770240370.

It is an arithmetic number, because the mean of its divisors is an integer number (510770240370).

Almost surely, 2^{1021540480739} is an apocalyptic number.

1021540480739 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021540480739 is an equidigital number, since it uses as much as digits as its factorization.

1021540480739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 1021540480739 in words is "one trillion, twenty-one billion, five hundred forty million, four hundred eighty thousand, seven hundred thirty-nine".