1253842 has 4 divisors (see below), whose sum is σ = 1880766. Its totient is φ = 626920.

The previous prime is 1253839. The next prime is 1253849. The reversal of 1253842 is 2483521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1252161 + 1681 = 1119^2 + 41^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1253849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313459 + ... + 313462.

2^1253842 is an apocalyptic number.

1253842 is a deficient number, since it is larger than the sum of its proper divisors (626924).

1253842 is an equidigital number, since it uses as much as digits as its factorization.

1253842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626923.

The product of its digits is 1920, while the sum is 25.

The square root of 1253842 is about 1119.7508651481. The cubic root of 1253842 is about 107.8319861299.

The spelling of 1253842 in words is "one million, two hundred fifty-three thousand, eight hundred forty-two".