1002015 has 24 divisors (see below), whose sum is σ = 1985568. Its totient is φ = 457920.

The previous prime is 1001989. The next prime is 1002017. The reversal of 1002015 is 5102001.

1002015 = 261² + 262² + ... + 274².

It is a happy number.

1002015 is nontrivially palindromic in base 4.

It is not a de Polignac number, because 1002015 - 2⁵ = 1001983 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 1001988 and 1002006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002017) 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, 1276 + ... + 1905.

It is an arithmetic number, because the mean of its divisors is an integer number (82732).

2^1002015 is an apocalyptic number.

1002015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1002015 is a deficient number, since it is larger than the sum of its proper divisors (983553).

1002015 is a wasteful number, since it uses less digits than its factorization.

1002015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3199 (or 3196 counting only the distinct ones).

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

The square root of 1002015 is about 1001.0069929826. The cubic root of 1002015 is about 100.0671216035.

Adding to 1002015 its reverse (5102001), we get a palindrome (6104016).

The spelling of 1002015 in words is "one million, two thousand, fifteen".