2131237 has 4 divisors (see below), whose sum is σ = 2188876. Its totient is φ = 2073600.

The previous prime is 2131231. The next prime is 2131243. The reversal of 2131237 is 7321312.

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

It is an interprime number because it is at equal distance from previous prime (2131231) and next prime (2131243).

It can be written as a sum of positive squares in 2 ways, for example, as 2070721 + 60516 = 1439^2 + 246^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131237 - 2⁷ = 2131109 is a prime.

It is a d-powerful number, because it can be written as 2¹⁵ + 1 + 3⁵ + 1 + 2²¹ + 3⁶ + 7³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28764 + ... + 28837.

It is an arithmetic number, because the mean of its divisors is an integer number (547219).

2^2131237 is an apocalyptic number.

It is an amenable number.

2131237 is a deficient number, since it is larger than the sum of its proper divisors (57639).

2131237 is an equidigital number, since it uses as much as digits as its factorization.

2131237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57638.

The product of its digits is 252, while the sum is 19.

The square root of 2131237 is about 1459.8756796385. The cubic root of 2131237 is about 128.6897377203.

Adding to 2131237 its reverse (7321312), we get a palindrome (9452549).

It can be divided in two parts, 21312 and 37, that multiplied together give a square (788544 = 888²).

The spelling of 2131237 in words is "two million, one hundred thirty-one thousand, two hundred thirty-seven".