1287434 has 8 divisors (see below), whose sum is σ = 1939140. Its totient is φ = 641056.

The previous prime is 1287431. The next prime is 1287457. The reversal of 1287434 is 4347821.

It can be written as a sum of positive squares in 2 ways, for example, as 896809 + 390625 = 947^2 + 625^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1287397 and 1287406.

It is not an unprimeable number, because it can be changed into a prime (1287431) 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, 659 + ... + 1734.

2^1287434 is an apocalyptic number.

1287434 is a deficient number, since it is larger than the sum of its proper divisors (651706).

1287434 is a wasteful number, since it uses less digits than its factorization.

1287434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2664.

The product of its digits is 5376, while the sum is 29.

The square root of 1287434 is about 1134.6514883434. The cubic root of 1287434 is about 108.7864967563.

The spelling of 1287434 in words is "one million, two hundred eighty-seven thousand, four hundred thirty-four".