2947257 has 6 divisors (see below), whose sum is σ = 4257162. Its totient is φ = 1964832.

The previous prime is 2947249. The next prime is 2947271. The reversal of 2947257 is 7527492.

It can be written as a sum of positive squares in only one way, i.e., 2944656 + 2601 = 1716^2 + 51^2 .

It is not a de Polignac number, because 2947257 - 2³ = 2947249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2947207) 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 5 ways as a sum of consecutive naturals, for example, 163728 + ... + 163745.

It is an arithmetic number, because the mean of its divisors is an integer number (709527).

2^2947257 is an apocalyptic number.

It is an amenable number.

2947257 is a deficient number, since it is larger than the sum of its proper divisors (1309905).

2947257 is a wasteful number, since it uses less digits than its factorization.

2947257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327479 (or 327476 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 2947257 is about 1716.7576998517. The cubic root of 2947257 is about 143.3747485634.

The spelling of 2947257 in words is "two million, nine hundred forty-seven thousand, two hundred fifty-seven".