1020587 has 4 divisors (see below), whose sum is σ = 1023120. Its totient is φ = 1018056.

The previous prime is 1020583. The next prime is 1020589. The reversal of 1020587 is 7850201.

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

It is a cyclic number.

It is not a de Polignac number, because 1020587 - 2² = 1020583 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020583) 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, 512 + ... + 1517.

It is an arithmetic number, because the mean of its divisors is an integer number (255780).

2^1020587 is an apocalyptic number.

1020587 is a deficient number, since it is larger than the sum of its proper divisors (2533).

1020587 is an equidigital number, since it uses as much as digits as its factorization.

1020587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 1020587 is about 1010.2410603415. The cubic root of 1020587 is about 100.6815773030.

Adding to 1020587 its reverse (7850201), we get a palindrome (8870788).

The spelling of 1020587 in words is "one million, twenty thousand, five hundred eighty-seven".