1243854 has 24 divisors (see below), whose sum is σ = 2837640. Its totient is φ = 392688.

The previous prime is 1243843. The next prime is 1243859. The reversal of 1243854 is 4583421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1477 + ... + 2160.

It is an arithmetic number, because the mean of its divisors is an integer number (118235).

2^1243854 is an apocalyptic number.

1243854 is an abundant number, since it is smaller than the sum of its proper divisors (1593786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1243854 is a wasteful number, since it uses less digits than its factorization.

1243854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3664 (or 3661 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 1243854 is about 1115.2820271124. The cubic root of 1243854 is about 107.5448956156.

The spelling of 1243854 in words is "one million, two hundred forty-three thousand, eight hundred fifty-four".