9240134821 has 4 divisors (see below), whose sum is σ = 9241150444. Its totient is φ = 9239119200.

The previous prime is 9240134803. The next prime is 9240134833. The reversal of 9240134821 is 1284310429.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1284310429 = 823 ⋅1560523.

It can be written as a sum of positive squares in 2 ways, for example, as 4790577796 + 4449557025 = 69214^2 + 66705^2 .

It is a cyclic number.

It is not a de Polignac number, because 9240134821 - 2¹⁷ = 9240003749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9240134021) 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 3 ways as a sum of consecutive naturals, for example, 494040 + ... + 512401.

It is an arithmetic number, because the mean of its divisors is an integer number (2310287611).

Almost surely, 2^9240134821 is an apocalyptic number.

It is an amenable number.

9240134821 is a deficient number, since it is larger than the sum of its proper divisors (1015623).

9240134821 is a wasteful number, since it uses less digits than its factorization.

9240134821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015622.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 9240134821 is about 96125.6200032021. The cubic root of 9240134821 is about 2098.4217030611.

The spelling of 9240134821 in words is "nine billion, two hundred forty million, one hundred thirty-four thousand, eight hundred twenty-one".