2015842 has 4 divisors (see below), whose sum is σ = 3023766. Its totient is φ = 1007920.

The previous prime is 2015833. The next prime is 2015851. The reversal of 2015842 is 2485102.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2015833) and next prime (2015851).

It can be written as a sum of positive squares in only one way, i.e., 1185921 + 829921 = 1089^2 + 911^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a plaindrome in base 6.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 503959 + ... + 503962.

2^2015842 is an apocalyptic number.

2015842 is a deficient number, since it is larger than the sum of its proper divisors (1007924).

2015842 is a wasteful number, since it uses less digits than its factorization.

2015842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007923.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 2015842 is about 1419.8035075319. The cubic root of 2015842 is about 126.3238916526.

The spelling of 2015842 in words is "two million, fifteen thousand, eight hundred forty-two".