1278003 has 8 divisors (see below), whose sum is σ = 1743808. Its totient is φ = 832104.

The previous prime is 1277993. The next prime is 1278007. The reversal of 1278003 is 3008721.

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

It is not a de Polignac number, because 1278003 - 2⁵ = 1277971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1278007) 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, 4825 + ... + 5082.

It is an arithmetic number, because the mean of its divisors is an integer number (217976).

2^1278003 is an apocalyptic number.

1278003 is a deficient number, since it is larger than the sum of its proper divisors (465805).

1278003 is an equidigital number, since it uses as much as digits as its factorization.

1278003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9953.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 1278003 is about 1130.4879477465. The cubic root of 1278003 is about 108.5202097318.

The spelling of 1278003 in words is "one million, two hundred seventy-eight thousand, three".