851530741 has 8 divisors (see below), whose sum is σ = 881350200. Its totient is φ = 821741760.

The previous prime is 851530711. The next prime is 851530747. The reversal of 851530741 is 147035158.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 52620516 + 798910225 = 7254^2 + 28265^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 851530741 - 2¹³ = 851522549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 851530697 and 851530706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851530747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59331 + ... + 72271.

It is an arithmetic number, because the mean of its divisors is an integer number (110168775).

Almost surely, 2^851530741 is an apocalyptic number.

It is an amenable number.

851530741 is a deficient number, since it is larger than the sum of its proper divisors (29819459).

851530741 is a wasteful number, since it uses less digits than its factorization.

851530741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15239.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 851530741 is about 29180.9996573113. Note that the first 3 decimals coincide. The cubic root of 851530741 is about 947.8365323874.

Adding to 851530741 its reverse (147035158), we get a palindrome (998565899).

The spelling of 851530741 in words is "eight hundred fifty-one million, five hundred thirty thousand, seven hundred forty-one".