1506000161 has 4 divisors (see below), whose sum is σ = 1515973824. Its totient is φ = 1496026500.

The previous prime is 1506000143. The next prime is 1506000191. The reversal of 1506000161 is 1610006051.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1610006051 = 127 ⋅12677213.

It is a cyclic number.

It is not a de Polignac number, because 1506000161 - 2²⁶ = 1438891297 is a prime.

It is a super-3 number, since 3×1506000161³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1506000191) 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, 4986605 + ... + 4986906.

It is an arithmetic number, because the mean of its divisors is an integer number (378993456).

Almost surely, 2^1506000161 is an apocalyptic number.

It is an amenable number.

1506000161 is a deficient number, since it is larger than the sum of its proper divisors (9973663).

1506000161 is an equidigital number, since it uses as much as digits as its factorization.

1506000161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9973662.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1506000161 is about 38807.2178982209. The cubic root of 1506000161 is about 1146.2385385193.

The spelling of 1506000161 in words is "one billion, five hundred six million, one hundred sixty-one", and thus it is an aban number.