2115506 has 4 divisors (see below), whose sum is σ = 3173262. Its totient is φ = 1057752.

The previous prime is 2115499. The next prime is 2115511. The reversal of 2115506 is 6055112.

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

It can be written as a sum of positive squares in only one way, i.e., 1934881 + 180625 = 1391^2 + 425^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528875 + ... + 528878.

2^2115506 is an apocalyptic number.

2115506 is a deficient number, since it is larger than the sum of its proper divisors (1057756).

2115506 is a wasteful number, since it uses less digits than its factorization.

2115506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057755.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 2115506 is about 1454.4779132046. The cubic root of 2115506 is about 128.3723289977.

The spelling of 2115506 in words is "two million, one hundred fifteen thousand, five hundred six".