947421 has 6 divisors (see below), whose sum is σ = 1368510. Its totient is φ = 631608.

The previous prime is 947417. The next prime is 947423. The reversal of 947421 is 124749.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 622521 + 324900 = 789^2 + 570^2 .

It is not a de Polignac number, because 947421 - 2² = 947417 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 947421.

It is not an unprimeable number, because it can be changed into a prime (947423) 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, 52626 + ... + 52643.

It is an arithmetic number, because the mean of its divisors is an integer number (228085).

2⁹⁴⁷⁴²¹ is an apocalyptic number.

It is an amenable number.

947421 is a deficient number, since it is larger than the sum of its proper divisors (421089).

947421 is a wasteful number, since it uses less digits than its factorization.

947421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105275 (or 105272 counting only the distinct ones).

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

The square root of 947421 is about 973.3555362764. The cubic root of 947421 is about 98.2157194470.

The spelling of 947421 in words is "nine hundred forty-seven thousand, four hundred twenty-one".