1742070797521 has 2 divisors, whose sum is σ = 1742070797522. Its totient is φ = 1742070797520.

The previous prime is 1742070797491. The next prime is 1742070797563. The reversal of 1742070797521 is 1257970702471.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1737928073025 + 4142724496 = 1318305^2 + 64364^2 .

It is a cyclic number.

It is not a de Polignac number, because 1742070797521 - 2¹¹ = 1742070795473 is a prime.

It is not a weakly prime, because it can be changed into another prime (1742070797021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 871035398760 + 871035398761.

It is an arithmetic number, because the mean of its divisors is an integer number (871035398761).

Almost surely, 2^{1742070797521} is an apocalyptic number.

It is an amenable number.

1742070797521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1742070797521 is an equidigital number, since it uses as much as digits as its factorization.

1742070797521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728720, while the sum is 52.

The spelling of 1742070797521 in words is "one trillion, seven hundred forty-two billion, seventy million, seven hundred ninety-seven thousand, five hundred twenty-one".