1071002687 has 4 divisors (see below), whose sum is σ = 1081606776. Its totient is φ = 1060398600.

The previous prime is 1071002657. The next prime is 1071002689. The reversal of 1071002687 is 7862001701.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1071002687 is a prime.

It is a super-2 number, since 2×1071002687² = 2294093511122439938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1071002689) 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, 5301893 + ... + 5302094.

It is an arithmetic number, because the mean of its divisors is an integer number (270401694).

Almost surely, 2^1071002687 is an apocalyptic number.

1071002687 is a deficient number, since it is larger than the sum of its proper divisors (10604089).

1071002687 is a wasteful number, since it uses less digits than its factorization.

1071002687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10604088.

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 1071002687 is about 32726.1773966958. The cubic root of 1071002687 is about 1023.1285103148.

The spelling of 1071002687 in words is "one billion, seventy-one million, two thousand, six hundred eighty-seven".