846248021 has 4 divisors (see below), whose sum is σ = 846306252. Its totient is φ = 846189792.

The previous prime is 846248017. The next prime is 846248057. The reversal of 846248021 is 120842648.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 786185521 + 60062500 = 28039^2 + 7750^2 .

It is a cyclic number.

It is not a de Polignac number, because 846248021 - 2² = 846248017 is a prime.

It is a super-2 number, since 2×846248021² = 1432271426092832882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (846248521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12761 + ... + 43073.

It is an arithmetic number, because the mean of its divisors is an integer number (211576563).

Almost surely, 2^846248021 is an apocalyptic number.

It is an amenable number.

846248021 is a deficient number, since it is larger than the sum of its proper divisors (58231).

846248021 is a wasteful number, since it uses less digits than its factorization.

846248021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58230.

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 846248021 is about 29090.3424008725. The cubic root of 846248021 is about 945.8724047091.

The spelling of 846248021 in words is "eight hundred forty-six million, two hundred forty-eight thousand, twenty-one".