1278106 has 4 divisors (see below), whose sum is σ = 1917162. Its totient is φ = 639052.

The previous prime is 1278097. The next prime is 1278107. The reversal of 1278106 is 6018721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6018721 = 2069 ⋅2909.

It can be written as a sum of positive squares in only one way, i.e., 737881 + 540225 = 859^2 + 735^2 .

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1278107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319525 + ... + 319528.

2^1278106 is an apocalyptic number.

1278106 is a deficient number, since it is larger than the sum of its proper divisors (639056).

1278106 is an equidigital number, since it uses as much as digits as its factorization.

1278106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639055.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 1278106 is about 1130.5335023784. The cubic root of 1278106 is about 108.5231250305.

The spelling of 1278106 in words is "one million, two hundred seventy-eight thousand, one hundred six".