1278242 has 8 divisors (see below), whose sum is σ = 2191296. Its totient is φ = 547812.

The previous prime is 1278227. The next prime is 1278253. The reversal of 1278242 is 2428721.

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

It is a super-2 number, since 2×1278242² = 3267805221128, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45638 + ... + 45665.

It is an arithmetic number, because the mean of its divisors is an integer number (273912).

2^1278242 is an apocalyptic number.

1278242 is a deficient number, since it is larger than the sum of its proper divisors (913054).

1278242 is an equidigital number, since it uses as much as digits as its factorization.

1278242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91312.

The product of its digits is 1792, while the sum is 26.

The square root of 1278242 is about 1130.5936493719. The cubic root of 1278242 is about 108.5269741170.

The spelling of 1278242 in words is "one million, two hundred seventy-eight thousand, two hundred forty-two".