1280734 has 32 divisors (see below), whose sum is σ = 2451456. Its totient is φ = 488160.

The previous prime is 1280707. The next prime is 1280737. The reversal of 1280734 is 4370821.

1280734 = T₄₅₆ + T₄₅₇ + ... + T₄₆₇.

It is an Ulam number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1280699 and 1280708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5529 + ... + 5755.

It is an arithmetic number, because the mean of its divisors is an integer number (76608).

2^1280734 is an apocalyptic number.

1280734 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1280734 is a deficient number, since it is larger than the sum of its proper divisors (1170722).

1280734 is a wasteful number, since it uses less digits than its factorization.

1280734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 1280734 is about 1131.6951886440. The cubic root of 1280734 is about 108.5974546827.

The spelling of 1280734 in words is "one million, two hundred eighty thousand, seven hundred thirty-four".