1506042173 has 4 divisors (see below), whose sum is σ = 1506146460. Its totient is φ = 1505937888.

The previous prime is 1506042127. The next prime is 1506042193. The reversal of 1506042173 is 3712406051.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3712406051 = 13933 ⋅266447.

It can be written as a sum of positive squares in 2 ways, for example, as 484792324 + 1021249849 = 22018^2 + 31957^2 .

It is a cyclic number.

It is not a de Polignac number, because 1506042173 - 2¹² = 1506038077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1506042193) 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, 26168 + ... + 60801.

It is an arithmetic number, because the mean of its divisors is an integer number (376536615).

Almost surely, 2^1506042173 is an apocalyptic number.

It is an amenable number.

1506042173 is a deficient number, since it is larger than the sum of its proper divisors (104287).

1506042173 is an equidigital number, since it uses as much as digits as its factorization.

1506042173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104286.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 1506042173 is about 38807.7591855031. The cubic root of 1506042173 is about 1146.2491970675.

The spelling of 1506042173 in words is "one billion, five hundred six million, forty-two thousand, one hundred seventy-three".