1891253 has 12 divisors (see below), whose sum is σ = 2370060. Its totient is φ = 1495872.

The previous prime is 1891249. The next prime is 1891273. The reversal of 1891253 is 3521981.

It can be written as a sum of positive squares in 2 ways, for example, as 103684 + 1787569 = 322^2 + 1337^2 .

It is not a de Polignac number, because 1891253 - 2² = 1891249 is a prime.

It is a Curzon number.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 848 + ... + 2121.

It is an arithmetic number, because the mean of its divisors is an integer number (197505).

2^1891253 is an apocalyptic number.

1891253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1891253 is a deficient number, since it is larger than the sum of its proper divisors (478807).

1891253 is a wasteful number, since it uses less digits than its factorization.

1891253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2996 (or 2989 counting only the distinct ones).

The product of its digits is 2160, while the sum is 29.

The square root of 1891253 is about 1375.2283446759. The cubic root of 1891253 is about 123.6658755537.

The spelling of 1891253 in words is "one million, eight hundred ninety-one thousand, two hundred fifty-three".