2138427 has 8 divisors (see below), whose sum is σ = 3168080. Its totient is φ = 1425600.

The previous prime is 2138419. The next prime is 2138429. The reversal of 2138427 is 7248312.

It is not a de Polignac number, because 2138427 - 2³ = 2138419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 79201 = 2138427 / (2 + 1 + 3 + 8 + 4 + 2 + 7).

It is a d-powerful number, because it can be written as 2¹⁸ + 1 + 3 + 8² + 4⁶ + 2²⁰ + 7⁷ .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2138427.

It is not an unprimeable number, because it can be changed into a prime (2138429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39574 + ... + 39627.

It is an arithmetic number, because the mean of its divisors is an integer number (396010).

2^2138427 is an apocalyptic number.

2138427 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2138427 is a deficient number, since it is larger than the sum of its proper divisors (1029653).

2138427 is an equidigital number, since it uses as much as digits as its factorization.

2138427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79210 (or 79204 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 2138427 is about 1462.3361446672. The cubic root of 2138427 is about 128.8342923684.

The spelling of 2138427 in words is "two million, one hundred thirty-eight thousand, four hundred twenty-seven".