1280578401 has 6 divisors (see below), whose sum is σ = 1849724370. Its totient is φ = 853718928.

The previous prime is 1280578381. The next prime is 1280578423. The reversal of 1280578401 is 1048750821.

1280578401 is a `hidden beast` number, since 1 + 2 + 80 + 578 + 4 + 0 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1262736225 + 17842176 = 35535^2 + 4224^2 .

It is not a de Polignac number, because 1280578401 - 2¹³ = 1280570209 is a prime.

It is a super-2 number, since 2×1280578401² = 3279762082215433602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1280578441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71143236 + ... + 71143253.

It is an arithmetic number, because the mean of its divisors is an integer number (308287395).

Almost surely, 2^1280578401 is an apocalyptic number.

It is an amenable number.

1280578401 is a deficient number, since it is larger than the sum of its proper divisors (569145969).

1280578401 is a wasteful number, since it uses less digits than its factorization.

1280578401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142286495 (or 142286492 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 1280578401 is about 35785.1701267438. The cubic root of 1280578401 is about 1085.9305659544.

The spelling of 1280578401 in words is "one billion, two hundred eighty million, five hundred seventy-eight thousand, four hundred one".