1500015 has 16 divisors (see below), whose sum is σ = 2618496. Its totient is φ = 727200.

The previous prime is 1500007. The next prime is 1500019. The reversal of 1500015 is 5100051.

It is not a de Polignac number, because 1500015 - 2³ = 1500007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1500019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4381 + ... + 4710.

It is an arithmetic number, because the mean of its divisors is an integer number (163656).

2^1500015 is an apocalyptic number.

1500015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1500015 is a deficient number, since it is larger than the sum of its proper divisors (1118481).

1500015 is a wasteful number, since it uses less digits than its factorization.

1500015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9110.

The product of its (nonzero) digits is 25, while the sum is 12.

The square root of 1500015 is about 1224.7509951006. The cubic root of 1500015 is about 114.4718058255.

Adding to 1500015 its reverse (5100051), we get a palindrome (6600066).

The spelling of 1500015 in words is "one million, five hundred thousand, fifteen".