1020687 has 8 divisors (see below), whose sum is σ = 1365936. Its totient is φ = 677952.

The previous prime is 1020683. The next prime is 1020689. The reversal of 1020687 is 7860201.

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

It is not a de Polignac number, because 1020687 - 2² = 1020683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020683) 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, 763 + ... + 1619.

It is an arithmetic number, because the mean of its divisors is an integer number (170742).

2^1020687 is an apocalyptic number.

1020687 is a deficient number, since it is larger than the sum of its proper divisors (345249).

1020687 is an equidigital number, since it uses as much as digits as its factorization.

1020687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 1020687 is about 1010.2905522670. The cubic root of 1020687 is about 100.6848655508.

Adding to 1020687 its reverse (7860201), we get a palindrome (8880888).

The spelling of 1020687 in words is "one million, twenty thousand, six hundred eighty-seven".