1278950345 has 8 divisors (see below), whose sum is σ = 1536235200. Its totient is φ = 1022163760.

The previous prime is 1278950311. The next prime is 1278950347. The reversal of 1278950345 is 5430598721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1278950345 - 2⁸ = 1278950089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1278950296 and 1278950305.

It is not an unprimeable number, because it can be changed into a prime (1278950347) by changing a digit.

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, 118895 + ... + 129204.

It is an arithmetic number, because the mean of its divisors is an integer number (192029400).

Almost surely, 2^1278950345 is an apocalyptic number.

It is an amenable number.

1278950345 is a deficient number, since it is larger than the sum of its proper divisors (257284855).

1278950345 is a wasteful number, since it uses less digits than its factorization.

1278950345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249135.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 1278950345 is about 35762.4152568028. The cubic root of 1278950345 is about 1085.4701735962.

The spelling of 1278950345 in words is "one billion, two hundred seventy-eight million, nine hundred fifty thousand, three hundred forty-five".