1205942 has 4 divisors (see below), whose sum is σ = 1808916. Its totient is φ = 602970.

The previous prime is 1205921. The next prime is 1205947. The reversal of 1205942 is 2495021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2495021 = 37 ⋅67433.

It is a super-2 number, since 2×1205942² = 2908592214728, which contains 22 as substring.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 301484 + ... + 301487.

It is an arithmetic number, because the mean of its divisors is an integer number (452229).

2^1205942 is an apocalyptic number.

1205942 is a deficient number, since it is larger than the sum of its proper divisors (602974).

1205942 is an equidigital number, since it uses as much as digits as its factorization.

1205942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602973.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1205942 is about 1098.1539054249. The cubic root of 1205942 is about 106.4409659089.

The spelling of 1205942 in words is "one million, two hundred five thousand, nine hundred forty-two".