1278741 has 8 divisors (see below), whose sum is σ = 1728640. Its totient is φ = 840672.

The previous prime is 1278733. The next prime is 1278769. The reversal of 1278741 is 1478721.

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

It is not a de Polignac number, because 1278741 - 2³ = 1278733 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1278699 and 1278708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2701 + ... + 3138.

It is an arithmetic number, because the mean of its divisors is an integer number (216080).

2^1278741 is an apocalyptic number.

It is an amenable number.

1278741 is a deficient number, since it is larger than the sum of its proper divisors (449899).

1278741 is an equidigital number, since it uses as much as digits as its factorization.

1278741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5915.

The product of its digits is 3136, while the sum is 30.

The square root of 1278741 is about 1130.8143083637. The cubic root of 1278741 is about 108.5410945299.

The spelling of 1278741 in words is "one million, two hundred seventy-eight thousand, seven hundred forty-one".