2015001 has 12 divisors (see below), whose sum is σ = 2925780. Its totient is φ = 1336320.

The previous prime is 2014997. The next prime is 2015011. The reversal of 2015001 is 1005102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 632025 + 1382976 = 795^2 + 1176^2 .

It is not a de Polignac number, because 2015001 - 2² = 2014997 is a prime.

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

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1705 + ... + 2633.

It is an arithmetic number, because the mean of its divisors is an integer number (243815).

2^2015001 is an apocalyptic number.

It is an amenable number.

2015001 is a deficient number, since it is larger than the sum of its proper divisors (910779).

2015001 is a wasteful number, since it uses less digits than its factorization.

2015001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176 (or 1173 counting only the distinct ones).

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

The square root of 2015001 is about 1419.5073088928. The cubic root of 2015001 is about 126.3063219604.

The spelling of 2015001 in words is "two million, fifteen thousand, one".