1287787142 has 8 divisors (see below), whose sum is σ = 1933362432. Its totient is φ = 643333000.

The previous prime is 1287787129. The next prime is 1287787153. The reversal of 1287787142 is 2417877821.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277409 + ... + 282012.

It is an arithmetic number, because the mean of its divisors is an integer number (241670304).

Almost surely, 2^1287787142 is an apocalyptic number.

1287787142 is a deficient number, since it is larger than the sum of its proper divisors (645575290).

1287787142 is a wasteful number, since it uses less digits than its factorization.

1287787142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560574.

The product of its digits is 351232, while the sum is 47.

The square root of 1287787142 is about 35885.7512391757. The cubic root of 1287787142 is about 1087.9644252669.

The spelling of 1287787142 in words is "one billion, two hundred eighty-seven million, seven hundred eighty-seven thousand, one hundred forty-two".