1278474243 has 8 divisors (see below), whose sum is σ = 1708331856. Its totient is φ = 850466400.

The previous prime is 1278474217. The next prime is 1278474277. The reversal of 1278474243 is 3424748721.

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

It is not a de Polignac number, because 1278474243 - 2⁶ = 1278474179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1278474195 and 1278474204.

It is not an unprimeable number, because it can be changed into a prime (1278474293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 460828 + ... + 463593.

It is an arithmetic number, because the mean of its divisors is an integer number (213541482).

Almost surely, 2^1278474243 is an apocalyptic number.

1278474243 is a deficient number, since it is larger than the sum of its proper divisors (429857613).

1278474243 is an equidigital number, since it uses as much as digits as its factorization.

1278474243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924885.

The product of its digits is 301056, while the sum is 42.

The square root of 1278474243 is about 35755.7581796275. The cubic root of 1278474243 is about 1085.3354645193.

The spelling of 1278474243 in words is "one billion, two hundred seventy-eight million, four hundred seventy-four thousand, two hundred forty-three".