1891053 has 8 divisors (see below), whose sum is σ = 2801600. Its totient is φ = 1260684.

The previous prime is 1891049. The next prime is 1891069. The reversal of 1891053 is 3501981.

It is not a de Polignac number, because 1891053 - 2² = 1891049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 70039 = 1891053 / (1 + 8 + 9 + 1 + 0 + 5 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1891073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34993 + ... + 35046.

It is an arithmetic number, because the mean of its divisors is an integer number (350200).

2^1891053 is an apocalyptic number.

It is an amenable number.

1891053 is a deficient number, since it is larger than the sum of its proper divisors (910547).

1891053 is an equidigital number, since it uses as much as digits as its factorization.

1891053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70048 (or 70042 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1891053 is about 1375.1556275564. The cubic root of 1891053 is about 123.6615161780.

The spelling of 1891053 in words is "one million, eight hundred ninety-one thousand, fifty-three".