1276398 has 20 divisors (see below), whose sum is σ = 2860440. Its totient is φ = 425412.

The previous prime is 1276397. The next prime is 1276409. The reversal of 1276398 is 8936721.

1276398 is a `hidden beast` number, since 12 + 7 + 639 + 8 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1276397) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3778 + ... + 4101.

It is an arithmetic number, because the mean of its divisors is an integer number (143022).

2^1276398 is an apocalyptic number.

1276398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1276398 is an abundant number, since it is smaller than the sum of its proper divisors (1584042).

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

1276398 is an equidigital number, since it uses as much as digits as its factorization.

1276398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7893 (or 7884 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 1276398 is about 1129.7778542705. Note that the first 3 decimals coincide. The cubic root of 1276398 is about 108.4747617684.

The spelling of 1276398 in words is "one million, two hundred seventy-six thousand, three hundred ninety-eight".