846240921 has 12 divisors (see below), whose sum is σ = 1222820820. Its totient is φ = 563942400.

The previous prime is 846240869. The next prime is 846240931. The reversal of 846240921 is 129042648.

846240921 is a `hidden beast` number, since 8 + 4 + 624 + 0 + 9 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 213014025 + 633226896 = 14595^2 + 25164^2 .

It is not a de Polignac number, because 846240921 - 2¹³ = 846232729 is a prime.

It is a super-2 number, since 2×846240921² = 1432247392749856482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (846240931) 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, 8425 + ... + 41993.

It is an arithmetic number, because the mean of its divisors is an integer number (101901735).

Almost surely, 2^846240921 is an apocalyptic number.

It is an amenable number.

846240921 is a deficient number, since it is larger than the sum of its proper divisors (376579899).

846240921 is a wasteful number, since it uses less digits than its factorization.

846240921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36376 (or 36373 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 846240921 is about 29090.2203669893. The cubic root of 846240921 is about 945.8697594196.

The spelling of 846240921 in words is "eight hundred forty-six million, two hundred forty thousand, nine hundred twenty-one".