851530742 has 4 divisors (see below), whose sum is σ = 1277296116. Its totient is φ = 425765370.

The previous prime is 851530711. The next prime is 851530747. The reversal of 851530742 is 247035158.

It is a happy number.

It is a semiprime because it is the product of two primes.

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 as a sum of consecutive naturals, namely, 212882684 + ... + 212882687.

It is an arithmetic number, because the mean of its divisors is an integer number (319324029).

Almost surely, 2^851530742 is an apocalyptic number.

851530742 is a deficient number, since it is larger than the sum of its proper divisors (425765374).

851530742 is a wasteful number, since it uses less digits than its factorization.

851530742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425765373.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 851530742 is about 29180.9996744457. Note that the first 3 decimals coincide. The cubic root of 851530742 is about 947.8365327584.

The spelling of 851530742 in words is "eight hundred fifty-one million, five hundred thirty thousand, seven hundred forty-two".