2158047 has 6 divisors (see below), whose sum is σ = 3117192. Its totient is φ = 1438692.

The previous prime is 2158033. The next prime is 2158061. The reversal of 2158047 is 7408512.

It is an interprime number because it is at equal distance from previous prime (2158033) and next prime (2158061).

It is not a de Polignac number, because 2158047 - 2¹¹ = 2155999 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2158047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119883 + ... + 119900.

It is an arithmetic number, because the mean of its divisors is an integer number (519532).

2^2158047 is an apocalyptic number.

2158047 is a deficient number, since it is larger than the sum of its proper divisors (959145).

2158047 is a wasteful number, since it uses less digits than its factorization.

2158047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239789 (or 239786 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 2158047 is about 1469.0292713217. The cubic root of 2158047 is about 129.2271102934.

The spelling of 2158047 in words is "two million, one hundred fifty-eight thousand, forty-seven".