851742245 has 16 divisors (see below), whose sum is σ = 1085989680. Its totient is φ = 641293312.

The previous prime is 851742197. The next prime is 851742253. The reversal of 851742245 is 542247158.

It can be written as a sum of positive squares in 8 ways, for example, as 64995844 + 786746401 = 8062^2 + 28049^2 .

It is not a de Polignac number, because 851742245 - 2⁶ = 851742181 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 851742199 and 851742208.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7229 + ... + 41901.

It is an arithmetic number, because the mean of its divisors is an integer number (67874355).

Almost surely, 2^851742245 is an apocalyptic number.

851742245 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

851742245 is a deficient number, since it is larger than the sum of its proper divisors (234247435).

851742245 is an equidigital number, since it uses as much as digits as its factorization.

851742245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34729 (or 34695 counting only the distinct ones).

The product of its digits is 89600, while the sum is 38.

The square root of 851742245 is about 29184.6234342676. The cubic root of 851742245 is about 947.9150007318.

The spelling of 851742245 in words is "eight hundred fifty-one million, seven hundred forty-two thousand, two hundred forty-five".