181775142 has 24 divisors (see below), whose sum is σ = 394825080. Its totient is φ = 60441120.

The previous prime is 181775137. The next prime is 181775197. The reversal of 181775142 is 241577181.

It is a junction number, because it is equal to n+sod(n) for n = 181775097 and 181775106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4984 + ... + 19707.

It is an arithmetic number, because the mean of its divisors is an integer number (16451045).

Almost surely, 2^181775142 is an apocalyptic number.

181775142 is an abundant number, since it is smaller than the sum of its proper divisors (213049938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181775142 is a wasteful number, since it uses less digits than its factorization.

181775142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25108 (or 25105 counting only the distinct ones).

The product of its digits is 15680, while the sum is 36.

The square root of 181775142 is about 13482.4011956328. The cubic root of 181775142 is about 566.4716296882.

The spelling of 181775142 in words is "one hundred eighty-one million, seven hundred seventy-five thousand, one hundred forty-two".