1278925430 has 16 divisors (see below), whose sum is σ = 2305362384. Its totient is φ = 510837600.

The previous prime is 1278925409. The next prime is 1278925441. The reversal of 1278925430 is 345298721.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84212 + ... + 98231.

It is an arithmetic number, because the mean of its divisors is an integer number (144085149).

Almost surely, 2^1278925430 is an apocalyptic number.

1278925430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1278925430 is a deficient number, since it is larger than the sum of its proper divisors (1026436954).

1278925430 is a wasteful number, since it uses less digits than its factorization.

1278925430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183151.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 1278925430 is about 35762.0669145395. The cubic root of 1278925430 is about 1085.4631249345.

The spelling of 1278925430 in words is "one billion, two hundred seventy-eight million, nine hundred twenty-five thousand, four hundred thirty".