1020140 has 24 divisors (see below), whose sum is σ = 2337552. Its totient is φ = 370880.

The previous prime is 1020137. The next prime is 1020143. The reversal of 1020140 is 410201.

It is an interprime number because it is at equal distance from previous prime (1020137) and next prime (1020143).

It is not an unprimeable number, because it can be changed into a prime (1020143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2099 + ... + 2538.

It is an arithmetic number, because the mean of its divisors is an integer number (97398).

2^1020140 is an apocalyptic number.

1020140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020140 is an abundant number, since it is smaller than the sum of its proper divisors (1317412).

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

1020140 is a wasteful number, since it uses less digits than its factorization.

1020140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4657 (or 4655 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1020140 is about 1010.0198017861. The cubic root of 1020140 is about 100.6668762087. Note that the first 3 decimals are identical.

Adding to 1020140 its reverse (410201), we get a palindrome (1430341).

The spelling of 1020140 in words is "one million, twenty thousand, one hundred forty".