1728161042 has 8 divisors (see below), whose sum is σ = 2592633036. Its totient is φ = 863950032.

The previous prime is 1728161041. The next prime is 1728161059. The reversal of 1728161042 is 2401618271.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1637739961 + 90421081 = 40469^2 + 9509^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1728161041) 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, 47753 + ... + 75740.

Almost surely, 2^1728161042 is an apocalyptic number.

1728161042 is a deficient number, since it is larger than the sum of its proper divisors (864471994).

1728161042 is a wasteful number, since it uses less digits than its factorization.

1728161042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130492.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 1728161042 is about 41571.1563707338. The cubic root of 1728161042 is about 1200.0372770827.

The spelling of 1728161042 in words is "one billion, seven hundred twenty-eight million, one hundred sixty-one thousand, forty-two".