1278122 has 8 divisors (see below), whose sum is σ = 1930500. Its totient is φ = 634624.

The previous prime is 1278113. The next prime is 1278131. The reversal of 1278122 is 2218721.

It is an interprime number because it is at equal distance from previous prime (1278113) and next prime (1278131).

It can be written as a sum of positive squares in 2 ways, for example, as 1274641 + 3481 = 1129^2 + 59^2 .

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

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1847 + ... + 2442.

2^1278122 is an apocalyptic number.

1278122 is a deficient number, since it is larger than the sum of its proper divisors (652378).

1278122 is a wasteful number, since it uses less digits than its factorization.

1278122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4440.

The product of its digits is 448, while the sum is 23.

The square root of 1278122 is about 1130.5405786614. The cubic root of 1278122 is about 108.5235778784.

It can be divided in two parts, 12781 and 22, that multiplied together give a palindrome (281182).

The spelling of 1278122 in words is "one million, two hundred seventy-eight thousand, one hundred twenty-two".