1242406 has 8 divisors (see below), whose sum is σ = 2033064. Its totient is φ = 564720.

The previous prime is 1242403. The next prime is 1242407. The reversal of 1242406 is 6042421.

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

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242403) 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 in 3 ways as a sum of consecutive naturals, for example, 28215 + ... + 28258.

It is an arithmetic number, because the mean of its divisors is an integer number (254133).

2^1242406 is an apocalyptic number.

1242406 is a deficient number, since it is larger than the sum of its proper divisors (790658).

1242406 is a wasteful number, since it uses less digits than its factorization.

1242406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56486.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1242406 is about 1114.6326749203. The cubic root of 1242406 is about 107.5031475552.

Adding to 1242406 its reverse (6042421), we get a palindrome (7284827).

The spelling of 1242406 in words is "one million, two hundred forty-two thousand, four hundred six".