1205243 has 8 divisors (see below), whose sum is σ = 1314768. Its totient is φ = 1098144.

The previous prime is 1205231. The next prime is 1205251. The reversal of 1205243 is 3425021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1205243 - 2⁶ = 1205179 is a prime.

It is a super-2 number, since 2×1205243² = 2905221378098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1205293) 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 7 ways as a sum of consecutive naturals, for example, 521 + ... + 1637.

It is an arithmetic number, because the mean of its divisors is an integer number (164346).

2^1205243 is an apocalyptic number.

1205243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1205243 is a deficient number, since it is larger than the sum of its proper divisors (109525).

1205243 is a wasteful number, since it uses less digits than its factorization.

1205243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 1205243 is about 1097.8355978925. The cubic root of 1205243 is about 106.4203964799.

The spelling of 1205243 in words is "one million, two hundred five thousand, two hundred forty-three".