1287170851 has 8 divisors (see below), whose sum is σ = 1319221008. Its totient is φ = 1255152000.

The previous prime is 1287170839. The next prime is 1287170867. The reversal of 1287170851 is 1580717821.

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

It is a cyclic number.

It is not a de Polignac number, because 1287170851 - 2¹³ = 1287162659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1287177851) 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, 90591 + ... + 103831.

It is an arithmetic number, because the mean of its divisors is an integer number (164902626).

Almost surely, 2^1287170851 is an apocalyptic number.

1287170851 is a deficient number, since it is larger than the sum of its proper divisors (32050157).

1287170851 is a wasteful number, since it uses less digits than its factorization.

1287170851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15653.

The product of its (nonzero) digits is 31360, while the sum is 40.

The square root of 1287170851 is about 35877.1633633430. The cubic root of 1287170851 is about 1087.7908433526.

The spelling of 1287170851 in words is "one billion, two hundred eighty-seven million, one hundred seventy thousand, eight hundred fifty-one".