155582842 has 4 divisors (see below), whose sum is σ = 233374266. Its totient is φ = 77791420.

The previous prime is 155582821. The next prime is 155582873. The reversal of 155582842 is 248285551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 122301481 + 33281361 = 11059^2 + 5769^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 155582795 and 155582804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38895709 + ... + 38895712.

Almost surely, 2^155582842 is an apocalyptic number.

155582842 is a deficient number, since it is larger than the sum of its proper divisors (77791424).

155582842 is an equidigital number, since it uses as much as digits as its factorization.

155582842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77791423.

The product of its digits is 128000, while the sum is 40.

The square root of 155582842 is about 12473.2851326345. The cubic root of 155582842 is about 537.8409930728.

The spelling of 155582842 in words is "one hundred fifty-five million, five hundred eighty-two thousand, eight hundred forty-two".