1891134 has 32 divisors (see below), whose sum is σ = 4803840. Its totient is φ = 540216.

The previous prime is 1891133. The next prime is 1891147. The reversal of 1891134 is 4311981.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1891098 and 1891107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1891133) 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, 2124 + ... + 2879.

It is an arithmetic number, because the mean of its divisors is an integer number (150120).

2^1891134 is an apocalyptic number.

1891134 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1891134 is an abundant number, since it is smaller than the sum of its proper divisors (2912706).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1891134 is a wasteful number, since it uses less digits than its factorization.

1891134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5021 (or 5015 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 1891134 is about 1375.1850784531. The cubic root of 1891134 is about 123.6632817622.

It can be divided in two parts, 1891 and 134, that added together give a square (2025 = 45²).

The spelling of 1891134 in words is "one million, eight hundred ninety-one thousand, one hundred thirty-four".