1287001430 has 32 divisors (see below), whose sum is σ = 2721606048. Its totient is φ = 432000000.

The previous prime is 1287001421. The next prime is 1287001447. The reversal of 1287001430 is 341007821.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 1287001430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 448571 + ... + 451430.

It is an arithmetic number, because the mean of its divisors is an integer number (85050189).

Almost surely, 2^1287001430 is an apocalyptic number.

1287001430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1287001430 is an abundant number, since it is smaller than the sum of its proper divisors (1434604618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1287001430 is a wasteful number, since it uses less digits than its factorization.

1287001430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900032.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1287001430 is about 35874.8021597332. The cubic root of 1287001430 is about 1087.7431152418.

The spelling of 1287001430 in words is "one billion, two hundred eighty-seven million, one thousand, four hundred thirty".