1071239849 has 8 divisors (see below), whose sum is σ = 1089904200. Its totient is φ = 1052611200.

The previous prime is 1071239843. The next prime is 1071239857. The reversal of 1071239849 is 9489321701.

It can be written as a sum of positive squares in 4 ways, for example, as 385847449 + 685392400 = 19643^2 + 26180^2 .

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 1071239849 - 2⁴ = 1071239833 is a prime.

It is a super-2 number, since 2×1071239849² = 2295109628171085602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1071239843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55619 + ... + 72359.

It is an arithmetic number, because the mean of its divisors is an integer number (136238025).

Almost surely, 2^1071239849 is an apocalyptic number.

It is an amenable number.

1071239849 is a deficient number, since it is larger than the sum of its proper divisors (18664351).

1071239849 is a wasteful number, since it uses less digits than its factorization.

1071239849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17851.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 1071239849 is about 32729.8006257295. The cubic root of 1071239849 is about 1023.2040250010.

The spelling of 1071239849 in words is "one billion, seventy-one million, two hundred thirty-nine thousand, eight hundred forty-nine".