1071821915 has 16 divisors (see below), whose sum is σ = 1311818976. Its totient is φ = 840403200.

The previous prime is 1071821897. The next prime is 1071821921. The reversal of 1071821915 is 5191281701.

It is not a de Polignac number, because 1071821915 - 2⁶ = 1071821851 is a prime.

It is a super-2 number, since 2×1071821915² = 2297604434948534450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 391100 + ... + 393830.

It is an arithmetic number, because the mean of its divisors is an integer number (81988686).

Almost surely, 2^1071821915 is an apocalyptic number.

1071821915 is a deficient number, since it is larger than the sum of its proper divisors (239997061).

1071821915 is a wasteful number, since it uses less digits than its factorization.

1071821915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4270.

The product of its (nonzero) digits is 5040, while the sum is 35.

The square root of 1071821915 is about 32738.6914063467. The cubic root of 1071821915 is about 1023.3893132404.

The spelling of 1071821915 in words is "one billion, seventy-one million, eight hundred twenty-one thousand, nine hundred fifteen".