2128437 has 24 divisors (see below), whose sum is σ = 3363360. Its totient is φ = 1341360.

The previous prime is 2128409. The next prime is 2128439. The reversal of 2128437 is 7348212.

It is not a de Polignac number, because 2128437 - 2⁷ = 2128309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 2 + 1 + 2¹³ + 8⁷ + 4⁶ + 3⁷ + 7⁵ .

It is a self number, because there is not a number n which added to its sum of digits gives 2128437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4387 + ... + 4847.

It is an arithmetic number, because the mean of its divisors is an integer number (140140).

2^2128437 is an apocalyptic number.

2128437 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2128437 is a deficient number, since it is larger than the sum of its proper divisors (1234923).

2128437 is an equidigital number, since it uses as much as digits as its factorization.

2128437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495 (or 483 counting only the distinct ones).

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

The square root of 2128437 is about 1458.9163786866. The cubic root of 2128437 is about 128.6333558818.

It can be divided in two parts, 21284 and 37, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 2128437 in words is "two million, one hundred twenty-eight thousand, four hundred thirty-seven".