947257 has 4 divisors (see below), whose sum is σ = 1002996. Its totient is φ = 891520.

The previous prime is 947239. The next prime is 947263. The reversal of 947257 is 752749.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 752749 = 251 ⋅2999.

It can be written as a sum of positive squares in 2 ways, for example, as 881721 + 65536 = 939^2 + 256^2 .

It is a cyclic number.

It is not a de Polignac number, because 947257 - 2⁷ = 947129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (947357) 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 3 ways as a sum of consecutive naturals, for example, 27844 + ... + 27877.

It is an arithmetic number, because the mean of its divisors is an integer number (250749).

2⁹⁴⁷²⁵⁷ is an apocalyptic number.

It is an amenable number.

947257 is a deficient number, since it is larger than the sum of its proper divisors (55739).

947257 is a wasteful number, since it uses less digits than its factorization.

947257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55738.

The product of its digits is 17640, while the sum is 34.

The square root of 947257 is about 973.2712879768. The cubic root of 947257 is about 98.2100520237.

The spelling of 947257 in words is "nine hundred forty-seven thousand, two hundred fifty-seven".