1278475 has 12 divisors (see below), whose sum is σ = 1729800. Its totient is φ = 929600.

The previous prime is 1278467. The next prime is 1278479. The reversal of 1278475 is 5748721.

It is a happy number.

It is not a de Polignac number, because 1278475 - 2³ = 1278467 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1278475.

It is not an unprimeable number, because it can be changed into a prime (1278479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2050 + ... + 2599.

It is an arithmetic number, because the mean of its divisors is an integer number (144150).

2^1278475 is an apocalyptic number.

1278475 is a deficient number, since it is larger than the sum of its proper divisors (451325).

1278475 is a wasteful number, since it uses less digits than its factorization.

1278475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4670 (or 4665 counting only the distinct ones).

The product of its digits is 15680, while the sum is 34.

The square root of 1278475 is about 1130.6966878876. The cubic root of 1278475 is about 108.5335678733.

It can be divided in two parts, 12 and 78475, that added together give a palindrome (78487).

The spelling of 1278475 in words is "one million, two hundred seventy-eight thousand, four hundred seventy-five".