1253863 has 4 divisors (see below), whose sum is σ = 1350328. Its totient is φ = 1157400.

The previous prime is 1253851. The next prime is 1253887. The reversal of 1253863 is 3683521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3683521 = 571 ⋅6451.

It is a cyclic number.

It is not a de Polignac number, because 1253863 - 2⁵ = 1253831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48213 + ... + 48238.

It is an arithmetic number, because the mean of its divisors is an integer number (337582).

2^1253863 is an apocalyptic number.

1253863 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1253863 is a deficient number, since it is larger than the sum of its proper divisors (96465).

1253863 is an equidigital number, since it uses as much as digits as its factorization.

1253863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96464.

The product of its digits is 4320, while the sum is 28.

The square root of 1253863 is about 1119.7602421947. The cubic root of 1253863 is about 107.8325881353.

It can be divided in two parts, 1253 and 863, that added together give a square (2116 = 46²).

The spelling of 1253863 in words is "one million, two hundred fifty-three thousand, eight hundred sixty-three".