1287430 has 16 divisors (see below), whose sum is σ = 2392704. Its totient is φ = 498240.

The previous prime is 1287401. The next prime is 1287431. The reversal of 1287430 is 347821.

It is a junction number, because it is equal to n+sod(n) for n = 1287395 and 1287404.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1767 + ... + 2386.

It is an arithmetic number, because the mean of its divisors is an integer number (149544).

2^1287430 is an apocalyptic number.

1287430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1287430 is a deficient number, since it is larger than the sum of its proper divisors (1105274).

1287430 is a wasteful number, since it uses less digits than its factorization.

1287430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4191.

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

The square root of 1287430 is about 1134.6497256863. The cubic root of 1287430 is about 108.7863840912.

The spelling of 1287430 in words is "one million, two hundred eighty-seven thousand, four hundred thirty".