147156561 has 16 divisors (see below), whose sum is σ = 221707200. Its totient is φ = 96440544.

The previous prime is 147156557. The next prime is 147156587. The reversal of 147156561 is 165651741.

It is a happy number.

147156561 is a `hidden beast` number, since 1 + 47 + 1 + 56 + 561 = 666.

It is not a de Polignac number, because 147156561 - 2² = 147156557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (147156661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44596 + ... + 47781.

It is an arithmetic number, because the mean of its divisors is an integer number (13856700).

Almost surely, 2^147156561 is an apocalyptic number.

It is an amenable number.

147156561 is a deficient number, since it is larger than the sum of its proper divisors (74550639).

147156561 is an equidigital number, since it uses as much as digits as its factorization.

147156561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92445 (or 92439 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 147156561 is about 12130.8104016179. The cubic root of 147156561 is about 527.9505054329.

The spelling of 147156561 in words is "one hundred forty-seven million, one hundred fifty-six thousand, five hundred sixty-one".