1281336434 has 16 divisors (see below), whose sum is σ = 2206009728. Its totient is φ = 546785952.

The previous prime is 1281336431. The next prime is 1281336439. The reversal of 1281336434 is 4346331821.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1281336394 and 1281336403.

It is not an unprimeable number, because it can be changed into a prime (1281336431) 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, 193142 + ... + 199665.

It is an arithmetic number, because the mean of its divisors is an integer number (137875608).

Almost surely, 2^1281336434 is an apocalyptic number.

1281336434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1281336434 is a deficient number, since it is larger than the sum of its proper divisors (924673294).

1281336434 is a wasteful number, since it uses less digits than its factorization.

1281336434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393049.

The product of its digits is 41472, while the sum is 35.

The square root of 1281336434 is about 35795.7600003129. The cubic root of 1281336434 is about 1086.1447943670.

The spelling of 1281336434 in words is "one billion, two hundred eighty-one million, three hundred thirty-six thousand, four hundred thirty-four".