947921 has 12 divisors (see below), whose sum is σ = 1054080. Its totient is φ = 851760.

The previous prime is 947917. The next prime is 947927. The reversal of 947921 is 129749.

It is not a de Polignac number, because 947921 - 2² = 947917 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 947921.

It is not an unprimeable number, because it can be changed into a prime (947927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11960 + ... + 12038.

It is an arithmetic number, because the mean of its divisors is an integer number (87840).

2⁹⁴⁷⁹²¹ is an apocalyptic number.

It is an amenable number.

947921 is a deficient number, since it is larger than the sum of its proper divisors (106159).

947921 is a wasteful number, since it uses less digits than its factorization.

947921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176 (or 163 counting only the distinct ones).

The product of its digits is 4536, while the sum is 32.

The square root of 947921 is about 973.6123458543. The cubic root of 947921 is about 98.2329941409.

The spelling of 947921 in words is "nine hundred forty-seven thousand, nine hundred twenty-one".