1278470 has 16 divisors (see below), whose sum is σ = 2317680. Its totient is φ = 507744.

The previous prime is 1278467. The next prime is 1278479. The reversal of 1278470 is 748721.

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 (1278479) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1361 + ... + 2099.

It is an arithmetic number, because the mean of its divisors is an integer number (144855).

2^1278470 is an apocalyptic number.

1278470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1278470 is a deficient number, since it is larger than the sum of its proper divisors (1039210).

1278470 is a wasteful number, since it uses less digits than its factorization.

1278470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 1278470 is about 1130.6944768592. The cubic root of 1278470 is about 108.5334263848.

The spelling of 1278470 in words is "one million, two hundred seventy-eight thousand, four hundred seventy".