171802942 has 4 divisors (see below), whose sum is σ = 257704416. Its totient is φ = 85901470.

The previous prime is 171802903. The next prime is 171802949. The reversal of 171802942 is 249208171.

171802942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 249208171 = 307 ⋅811753.

It is a junction number, because it is equal to n+sod(n) for n = 171802898 and 171802907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171802949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42950734 + ... + 42950737.

It is an arithmetic number, because the mean of its divisors is an integer number (64426104).

Almost surely, 2^171802942 is an apocalyptic number.

171802942 is a deficient number, since it is larger than the sum of its proper divisors (85901474).

171802942 is an equidigital number, since it uses as much as digits as its factorization.

171802942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85901473.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 171802942 is about 13107.3621297346. The cubic root of 171802942 is about 555.9173121172.

The spelling of 171802942 in words is "one hundred seventy-one million, eight hundred two thousand, nine hundred forty-two".