1742985217 has 4 divisors (see below), whose sum is σ = 1743756336. Its totient is φ = 1742214100.

The previous prime is 1742985193. The next prime is 1742985229. The reversal of 1742985217 is 7125892471.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1742985217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1742985017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382159 + ... + 386692.

It is an arithmetic number, because the mean of its divisors is an integer number (435939084).

Almost surely, 2^1742985217 is an apocalyptic number.

It is an amenable number.

1742985217 is a deficient number, since it is larger than the sum of its proper divisors (771119).

1742985217 is an equidigital number, since it uses as much as digits as its factorization.

1742985217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771118.

The product of its digits is 282240, while the sum is 46.

The square root of 1742985217 is about 41749.0744448305. The cubic root of 1742985217 is about 1203.4588211166.

The spelling of 1742985217 in words is "one billion, seven hundred forty-two million, nine hundred eighty-five thousand, two hundred seventeen".