1042721775479 has 2 divisors, whose sum is σ = 1042721775480. Its totient is φ = 1042721775478.

The previous prime is 1042721775443. The next prime is 1042721775499. The reversal of 1042721775479 is 9745771272401.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1042721775479 - 2⁸ = 1042721775223 is a prime.

It is a congruent number.

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, 521360887739 + 521360887740.

It is an arithmetic number, because the mean of its divisors is an integer number (521360887740).

Almost surely, 2^{1042721775479} is an apocalyptic number.

1042721775479 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042721775479 is an equidigital number, since it uses as much as digits as its factorization.

1042721775479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6914880, while the sum is 56.

The spelling of 1042721775479 in words is "one trillion, forty-two billion, seven hundred twenty-one million, seven hundred seventy-five thousand, four hundred seventy-nine".