1042721775499 has 2 divisors, whose sum is σ = 1042721775500. Its totient is φ = 1042721775498.

The previous prime is 1042721775479. The next prime is 1042721775503. The reversal of 1042721775499 is 9945771272401.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1042721775499 - 2⁹ = 1042721774987 is a prime.

It is not a weakly prime, because it can be changed into another prime (1042721775409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521360887749 + 521360887750.

It is an arithmetic number, because the mean of its divisors is an integer number (521360887750).

Almost surely, 2^{1042721775499} is an apocalyptic number.

1042721775499 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042721775499 is an equidigital number, since it uses as much as digits as its factorization.

1042721775499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8890560, while the sum is 58.

The spelling of 1042721775499 in words is "one trillion, forty-two billion, seven hundred twenty-one million, seven hundred seventy-five thousand, four hundred ninety-nine".