1020015 has 24 divisors (see below), whose sum is σ = 1862640. Its totient is φ = 514944.

The previous prime is 1020013. The next prime is 1020023. The reversal of 1020015 is 5100201.

It is a happy number.

1020015 is nontrivially palindromic in base 4.

It is not a de Polignac number, because 1020015 - 2¹ = 1020013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

1020015 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1019979 and 1020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 259 + ... + 1451.

It is an arithmetic number, because the mean of its divisors is an integer number (77610).

2^1020015 is an apocalyptic number.

1020015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1020015 is a deficient number, since it is larger than the sum of its proper divisors (842625).

1020015 is a wasteful number, since it uses less digits than its factorization.

1020015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223 (or 1220 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 1020015 is about 1009.9579199155. The cubic root of 1020015 is about 100.6627643961.

Adding to 1020015 its reverse (5100201), we get a palindrome (6120216).

The spelling of 1020015 in words is "one million, twenty thousand, fifteen".