1742189985 has 16 divisors (see below), whose sum is σ = 3097226880. Its totient is φ = 929167920.

The previous prime is 1742189983. The next prime is 1742189989. The reversal of 1742189985 is 5899812471.

It is a happy number.

It is not a de Polignac number, because 1742189985 - 2¹ = 1742189983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1742189983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6452421 + ... + 6452690.

It is an arithmetic number, because the mean of its divisors is an integer number (193576680).

Almost surely, 2^1742189985 is an apocalyptic number.

1742189985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1742189985 is a deficient number, since it is larger than the sum of its proper divisors (1355036895).

1742189985 is a wasteful number, since it uses less digits than its factorization.

1742189985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12905125 (or 12905119 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 54.

The square root of 1742189985 is about 41739.5494106010. The cubic root of 1742189985 is about 1203.2757683977.

The spelling of 1742189985 in words is "one billion, seven hundred forty-two million, one hundred eighty-nine thousand, nine hundred eighty-five".