1008278401 has 4 divisors (see below), whose sum is σ = 1085838292. Its totient is φ = 930718512.

The previous prime is 1008278399. The next prime is 1008278417. The reversal of 1008278401 is 1048728001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 288966001 + 719312400 = 16999^2 + 26820^2 .

It is a cyclic number.

It is not a de Polignac number, because 1008278401 - 2¹ = 1008278399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1008278801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38779926 + ... + 38779951.

It is an arithmetic number, because the mean of its divisors is an integer number (271459573).

Almost surely, 2^1008278401 is an apocalyptic number.

It is an amenable number.

1008278401 is a deficient number, since it is larger than the sum of its proper divisors (77559891).

1008278401 is an equidigital number, since it uses as much as digits as its factorization.

1008278401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77559890.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 1008278401 is about 31753.3998337186. The cubic root of 1008278401 is about 1002.7518871704.

Subtracting 1008278401 from its reverse (1048728001), we obtain a square (40449600 = 6360²).

The spelling of 1008278401 in words is "one billion, eight million, two hundred seventy-eight thousand, four hundred one".