1121665870 has 32 divisors (see below), whose sum is σ = 2244453120. Its totient is φ = 400792320.

The previous prime is 1121665859. The next prime is 1121665873. The reversal of 1121665870 is 785661211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121665873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135135 + ... + 143194.

It is an arithmetic number, because the mean of its divisors is an integer number (70139160).

Almost surely, 2^1121665870 is an apocalyptic number.

1121665870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1121665870 is an abundant number, since it is smaller than the sum of its proper divisors (1122787250).

1121665870 is a wasteful number, since it uses less digits than its factorization.

1121665870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278380.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 1121665870 is about 33491.2805070215. The cubic root of 1121665870 is about 1039.0134474569.

The spelling of 1121665870 in words is "one billion, one hundred twenty-one million, six hundred sixty-five thousand, eight hundred seventy".