1002742173 has 36 divisors (see below), whose sum is σ = 1522903200. Its totient is φ = 659338056.

The previous prime is 1002742141. The next prime is 1002742177. The reversal of 1002742173 is 3712472001.

It is a happy number.

It is not a de Polignac number, because 1002742173 - 2⁵ = 1002742141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002742177) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1673728 + ... + 1674326.

Almost surely, 2^1002742173 is an apocalyptic number.

It is an amenable number.

1002742173 is a deficient number, since it is larger than the sum of its proper divisors (520161027).

1002742173 is an frugal number, since it uses more digits than its factorization.

1002742173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780 (or 685 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 1002742173 is about 31666.1044809746. The cubic root of 1002742173 is about 1000.9132234358.

The spelling of 1002742173 in words is "one billion, two million, seven hundred forty-two thousand, one hundred seventy-three".