2138445 has 12 divisors (see below), whose sum is σ = 3706716. Its totient is φ = 1140480.

The previous prime is 2138429. The next prime is 2138467. The reversal of 2138445 is 5448312.

2138445 is a `hidden beast` number, since 213 + 8 + 445 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1397124 + 741321 = 1182^2 + 861^2 .

It is not a de Polignac number, because 2138445 - 2⁴ = 2138429 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23716 + ... + 23805.

It is an arithmetic number, because the mean of its divisors is an integer number (308893).

2^2138445 is an apocalyptic number.

It is an amenable number.

2138445 is a deficient number, since it is larger than the sum of its proper divisors (1568271).

2138445 is a wasteful number, since it uses less digits than its factorization.

2138445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47532 (or 47529 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 2138445 is about 1462.3422991899. The cubic root of 2138445 is about 128.8346538508.

The spelling of 2138445 in words is "two million, one hundred thirty-eight thousand, four hundred forty-five".