2661147 has 8 divisors (see below), whose sum is σ = 3942480. Its totient is φ = 1774080.

The previous prime is 2661137. The next prime is 2661157. The reversal of 2661147 is 7411662.

2661147 is a `hidden beast` number, since 2 + 6 + 611 + 47 = 666.

2661147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2661137) and next prime (2661157).

It is a de Polignac number, because none of the positive numbers 2^k-2661147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 98561 = 2661147 / (2 + 6 + 6 + 1 + 1 + 4 + 7).

It is a self number, because there is not a number n which added to its sum of digits gives 2661147.

It is not an unprimeable number, because it can be changed into a prime (2661107) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 49254 + ... + 49307.

It is an arithmetic number, because the mean of its divisors is an integer number (492810).

2^2661147 is an apocalyptic number.

2661147 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2661147 is a deficient number, since it is larger than the sum of its proper divisors (1281333).

2661147 is an equidigital number, since it uses as much as digits as its factorization.

2661147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98570 (or 98564 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 2661147 is about 1631.3022405428. The cubic root of 2661147 is about 138.5765107024.

The spelling of 2661147 in words is "two million, six hundred sixty-one thousand, one hundred forty-seven".