1891233 has 24 divisors (see below), whose sum is σ = 2965248. Its totient is φ = 1156992.

The previous prime is 1891223. The next prime is 1891243. The reversal of 1891233 is 3321981.

It is an interprime number because it is at equal distance from previous prime (1891223) and next prime (1891243).

It is not a de Polignac number, because 1891233 - 2²⁰ = 842657 is a prime.

1891233 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1891197 and 1891206.

It is not an unprimeable number, because it can be changed into a prime (1891213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7060 + ... + 7322.

It is an arithmetic number, because the mean of its divisors is an integer number (123552).

2^1891233 is an apocalyptic number.

It is an amenable number.

1891233 is a deficient number, since it is larger than the sum of its proper divisors (1074015).

1891233 is a wasteful number, since it uses less digits than its factorization.

1891233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333 (or 330 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 1891233 is about 1375.2210731370. The cubic root of 1891233 is about 123.6654396299.

The spelling of 1891233 in words is "one million, eight hundred ninety-one thousand, two hundred thirty-three".