1020660 has 24 divisors (see below), whose sum is σ = 2858016. Its totient is φ = 272160.

The previous prime is 1020631. The next prime is 1020667. The reversal of 1020660 is 660201.

Added to its reverse (660201) it gives a triangular number (1680861 = T₁₈₃₃).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020667) 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, 8446 + ... + 8565.

It is an arithmetic number, because the mean of its divisors is an integer number (119084).

2^1020660 is an apocalyptic number.

1020660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020660 is an abundant number, since it is smaller than the sum of its proper divisors (1837356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020660 is a wasteful number, since it uses less digits than its factorization.

1020660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17023 (or 17021 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1020660 is about 1010.2771896861. The cubic root of 1020660 is about 100.6839777450.

Adding to 1020660 its reverse (660201), we get a palindrome (1680861).

The spelling of 1020660 in words is "one million, twenty thousand, six hundred sixty".