1213942 has 4 divisors (see below), whose sum is σ = 1820916. Its totient is φ = 606970.

The previous prime is 1213939. The next prime is 1213943. The reversal of 1213942 is 2493121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213943) 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, 303484 + ... + 303487.

It is an arithmetic number, because the mean of its divisors is an integer number (455229).

2^1213942 is an apocalyptic number.

1213942 is a deficient number, since it is larger than the sum of its proper divisors (606974).

1213942 is an equidigital number, since it uses as much as digits as its factorization.

1213942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606973.

The product of its digits is 432, while the sum is 22.

The square root of 1213942 is about 1101.7903611849. The cubic root of 1213942 is about 106.6758173573.

The spelling of 1213942 in words is "one million, two hundred thirteen thousand, nine hundred forty-two".