1121870 has 16 divisors (see below), whose sum is σ = 2067120. Its totient is φ = 438144.

The previous prime is 1121867. The next prime is 1121899. The reversal of 1121870 is 781211.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 875 + ... + 1734.

It is an arithmetic number, because the mean of its divisors is an integer number (129195).

2^1121870 is an apocalyptic number.

1121870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1121870 is a deficient number, since it is larger than the sum of its proper divisors (945250).

1121870 is a wasteful number, since it uses less digits than its factorization.

1121870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2659.

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 1121870 is about 1059.1836479100. The cubic root of 1121870 is about 103.9076473044.

It can be divided in two parts, 1121 and 870, that added together give a palindrome (1991).

The spelling of 1121870 in words is "one million, one hundred twenty-one thousand, eight hundred seventy".