1081451278 has 4 divisors (see below), whose sum is σ = 1622176920. Its totient is φ = 540725638.

The previous prime is 1081451227. The next prime is 1081451347. The reversal of 1081451278 is 8721541801.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 270362818 + ... + 270362821.

It is an arithmetic number, because the mean of its divisors is an integer number (405544230).

Almost surely, 2^1081451278 is an apocalyptic number.

1081451278 is a deficient number, since it is larger than the sum of its proper divisors (540725642).

1081451278 is an equidigital number, since it uses as much as digits as its factorization.

1081451278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540725641.

The product of its (nonzero) digits is 17920, while the sum is 37.

The square root of 1081451278 is about 32885.4265290873. The cubic root of 1081451278 is about 1026.4449272110. Note that the first 3 decimals are identical.

The spelling of 1081451278 in words is "one billion, eighty-one million, four hundred fifty-one thousand, two hundred seventy-eight".