1278402 has 8 divisors (see below), whose sum is σ = 2556816. Its totient is φ = 426132.

The previous prime is 1278401. The next prime is 1278419. The reversal of 1278402 is 2048721.

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

1278402 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1278401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106528 + ... + 106539.

It is an arithmetic number, because the mean of its divisors is an integer number (319602).

2^1278402 is an apocalyptic number.

1278402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1278402 is a wasteful number, since it uses less digits than its factorization.

1278402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213072.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 1278402 is about 1130.6644064443. The cubic root of 1278402 is about 108.5315021045.

The spelling of 1278402 in words is "one million, two hundred seventy-eight thousand, four hundred two".