1240342 has 4 divisors (see below), whose sum is σ = 1860516. Its totient is φ = 620170.

The previous prime is 1240333. The next prime is 1240361. The reversal of 1240342 is 2430421.

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

It is a congruent number.

It is an unprimeable number.

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, 310084 + ... + 310087.

It is an arithmetic number, because the mean of its divisors is an integer number (465129).

2^1240342 is an apocalyptic number.

1240342 is a deficient number, since it is larger than the sum of its proper divisors (620174).

1240342 is an equidigital number, since it uses as much as digits as its factorization.

1240342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620173.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1240342 is about 1113.7064245123. The cubic root of 1240342 is about 107.4435831608.

Adding to 1240342 its reverse (2430421), we get a palindrome (3670763).

The spelling of 1240342 in words is "one million, two hundred forty thousand, three hundred forty-two".