1020138 has 32 divisors (see below), whose sum is σ = 2363904. Its totient is φ = 287472.

The previous prime is 1020137. The next prime is 1020143. The reversal of 1020138 is 8310201.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1020137) 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 15 ways as a sum of consecutive naturals, for example, 4381 + ... + 4607.

It is an arithmetic number, because the mean of its divisors is an integer number (73872).

2^1020138 is an apocalyptic number.

1020138 is an abundant number, since it is smaller than the sum of its proper divisors (1343766).

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

1020138 is a wasteful number, since it uses less digits than its factorization.

1020138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1020138 is about 1010.0188117060. The cubic root of 1020138 is about 100.6668104223. Note that the first 3 decimals are identical.

Adding to 1020138 its reverse (8310201), we get a palindrome (9330339).

The spelling of 1020138 in words is "one million, twenty thousand, one hundred thirty-eight".