147855261 has 4 divisors (see below), whose sum is σ = 197140352. Its totient is φ = 98570172.

The previous prime is 147855241. The next prime is 147855263. The reversal of 147855261 is 162558741.

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.

It is not a de Polignac number, because 147855261 - 2⁷ = 147855133 is a prime.

It is a super-2 number, since 2×147855261² = 43722356410756242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147855263) 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 3 ways as a sum of consecutive naturals, for example, 24642541 + ... + 24642546.

It is an arithmetic number, because the mean of its divisors is an integer number (49285088).

Almost surely, 2^147855261 is an apocalyptic number.

It is an amenable number.

147855261 is a deficient number, since it is larger than the sum of its proper divisors (49285091).

147855261 is an equidigital number, since it uses as much as digits as its factorization.

147855261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49285090.

The product of its digits is 67200, while the sum is 39.

The square root of 147855261 is about 12159.5748692132. The cubic root of 147855261 is about 528.7847569214.

The spelling of 147855261 in words is "one hundred forty-seven million, eight hundred fifty-five thousand, two hundred sixty-one".