1278498 has 32 divisors (see below), whose sum is σ = 2834496. Its totient is φ = 381888.

The previous prime is 1278493. The next prime is 1278527. The reversal of 1278498 is 8948721.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1278493) 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 15 ways as a sum of consecutive naturals, for example, 2665 + ... + 3107.

It is an arithmetic number, because the mean of its divisors is an integer number (88578).

2^1278498 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1278498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1417248).

1278498 is an abundant number, since it is smaller than the sum of its proper divisors (1555998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1278498 is a wasteful number, since it uses less digits than its factorization.

1278498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498.

The product of its digits is 32256, while the sum is 39.

The square root of 1278498 is about 1130.7068585624. The cubic root of 1278498 is about 108.5342187156.

The spelling of 1278498 in words is "one million, two hundred seventy-eight thousand, four hundred ninety-eight".