1278495 has 12 divisors (see below), whose sum is σ = 2216136. Its totient is φ = 681840.

The previous prime is 1278493. The next prime is 1278527. The reversal of 1278495 is 5948721.

It is not a de Polignac number, because 1278495 - 2¹ = 1278493 is a prime.

1278495 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278493) 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, 14161 + ... + 14250.

It is an arithmetic number, because the mean of its divisors is an integer number (184678).

2^1278495 is an apocalyptic number.

1278495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1278495 is a deficient number, since it is larger than the sum of its proper divisors (937641).

1278495 is a wasteful number, since it uses less digits than its factorization.

1278495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28422 (or 28419 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 1278495 is about 1130.7055319578. The cubic root of 1278495 is about 108.5341338236.

The spelling of 1278495 in words is "one million, two hundred seventy-eight thousand, four hundred ninety-five".