1251842 has 16 divisors (see below), whose sum is σ = 1976064. Its totient is φ = 594000.

The previous prime is 1251841. The next prime is 1251851. The reversal of 1251842 is 2481521.

It is not an unprimeable number, because it can be changed into a prime (1251841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3617 + ... + 3947.

It is an arithmetic number, because the mean of its divisors is an integer number (123504).

2^1251842 is an apocalyptic number.

1251842 is a deficient number, since it is larger than the sum of its proper divisors (724222).

1251842 is a wasteful number, since it uses less digits than its factorization.

1251842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425.

The product of its digits is 640, while the sum is 23.

The square root of 1251842 is about 1118.8574529403. The cubic root of 1251842 is about 107.7746214480.

The spelling of 1251842 in words is "one million, two hundred fifty-one thousand, eight hundred forty-two".