1278084455 has 16 divisors (see below), whose sum is σ = 1543232064. Its totient is φ = 1016133120.

The previous prime is 1278084449. The next prime is 1278084517. The reversal of 1278084455 is 5544808721.

It is not a de Polignac number, because 1278084455 - 2¹² = 1278080359 is a prime.

It is a super-2 number, since 2×1278084455² = 3266999748225294050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 882542 + ... + 883988.

It is an arithmetic number, because the mean of its divisors is an integer number (96452004).

Almost surely, 2^1278084455 is an apocalyptic number.

1278084455 is a deficient number, since it is larger than the sum of its proper divisors (265147609).

1278084455 is a wasteful number, since it uses less digits than its factorization.

1278084455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426.

The product of its (nonzero) digits is 358400, while the sum is 44.

The square root of 1278084455 is about 35750.3070616184. The cubic root of 1278084455 is about 1085.2251523657.

The spelling of 1278084455 in words is "one billion, two hundred seventy-eight million, eighty-four thousand, four hundred fifty-five".