1742520405117 has 16 divisors (see below), whose sum is σ = 2483019738432. Its totient is φ = 1083127944960.

The previous prime is 1742520405113. The next prime is 1742520405133. The reversal of 1742520405117 is 7115040252471.

It is not a de Polignac number, because 1742520405117 - 2² = 1742520405113 is a prime.

It is a super-2 number, since 2×1742520405117² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1742520405113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159653734 + ... + 159664647.

It is an arithmetic number, because the mean of its divisors is an integer number (155188733652).

Almost surely, 2^{1742520405117} is an apocalyptic number.

1742520405117 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1742520405117 is a deficient number, since it is larger than the sum of its proper divisors (740499333315).

1742520405117 is a wasteful number, since it uses less digits than its factorization.

1742520405117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319318508.

The product of its (nonzero) digits is 78400, while the sum is 39.

Adding to 1742520405117 its reverse (7115040252471), we get a palindrome (8857560657588).

The spelling of 1742520405117 in words is "one trillion, seven hundred forty-two billion, five hundred twenty million, four hundred five thousand, one hundred seventeen".