1274778434 has 4 divisors (see below), whose sum is σ = 1912167654. Its totient is φ = 637389216.

The previous prime is 1274778431. The next prime is 1274778451. The reversal of 1274778434 is 4348774721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4348774721 = 29 ⋅149957749.

It can be written as a sum of positive squares in only one way, i.e., 1135892209 + 138886225 = 33703^2 + 11785^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1274778431) 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 as a sum of consecutive naturals, namely, 318694607 + ... + 318694610.

Almost surely, 2^1274778434 is an apocalyptic number.

1274778434 is a deficient number, since it is larger than the sum of its proper divisors (637389220).

1274778434 is an equidigital number, since it uses as much as digits as its factorization.

1274778434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637389219.

The product of its digits is 1053696, while the sum is 47.

The square root of 1274778434 is about 35704.0394633436. The cubic root of 1274778434 is about 1084.2886271140.

The spelling of 1274778434 in words is "one billion, two hundred seventy-four million, seven hundred seventy-eight thousand, four hundred thirty-four".