1278450341 has 4 divisors (see below), whose sum is σ = 1461086112. Its totient is φ = 1095814572.

The previous prime is 1278450311. The next prime is 1278450343. The reversal of 1278450341 is 1430548721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1430548721 = 7 ⋅204364103.

It is a cyclic number.

It is not a de Polignac number, because 1278450341 - 2¹⁴ = 1278433957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278450343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91317875 + ... + 91317888.

It is an arithmetic number, because the mean of its divisors is an integer number (365271528).

Almost surely, 2^1278450341 is an apocalyptic number.

It is an amenable number.

1278450341 is a deficient number, since it is larger than the sum of its proper divisors (182635771).

1278450341 is an equidigital number, since it uses as much as digits as its factorization.

1278450341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182635770.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 1278450341 is about 35755.4239381943. The cubic root of 1278450341 is about 1085.3287007668.

The spelling of 1278450341 in words is "one billion, two hundred seventy-eight million, four hundred fifty thousand, three hundred forty-one".