1287084101 has 4 divisors (see below), whose sum is σ = 1291730892. Its totient is φ = 1282437312.

The previous prime is 1287083999. The next prime is 1287084103. The reversal of 1287084101 is 1014807821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1014807821 = 73 ⋅13901477.

It can be written as a sum of positive squares in 2 ways, for example, as 256032001 + 1031052100 = 16001^2 + 32110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1287084101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287084103) 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, 2322980 + ... + 2323533.

It is an arithmetic number, because the mean of its divisors is an integer number (322932723).

Almost surely, 2^1287084101 is an apocalyptic number.

It is an amenable number.

1287084101 is a deficient number, since it is larger than the sum of its proper divisors (4646791).

1287084101 is an equidigital number, since it uses as much as digits as its factorization.

1287084101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4646790.

The product of its (nonzero) digits is 3584, while the sum is 32.

The square root of 1287084101 is about 35875.9543566439. The cubic root of 1287084101 is about 1087.7664052666.

The spelling of 1287084101 in words is "one billion, two hundred eighty-seven million, eighty-four thousand, one hundred one".