1241999 has 4 divisors (see below), whose sum is σ = 1354920. Its totient is φ = 1129080.

The previous prime is 1241987. The next prime is 1242001. The reversal of 1241999 is 9991421.

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

It is a cyclic number.

It is not a de Polignac number, because 1241999 - 2⁸ = 1241743 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 (1241939) 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 3 ways as a sum of consecutive naturals, for example, 56444 + ... + 56465.

It is an arithmetic number, because the mean of its divisors is an integer number (338730).

2^1241999 is an apocalyptic number.

1241999 is a deficient number, since it is larger than the sum of its proper divisors (112921).

1241999 is a wasteful number, since it uses less digits than its factorization.

1241999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112920.

The product of its digits is 5832, while the sum is 35.

The square root of 1241999 is about 1114.4500886087. The cubic root of 1241999 is about 107.4914072815.

The spelling of 1241999 in words is "one million, two hundred forty-one thousand, nine hundred ninety-nine".