2821537 has 2 divisors, whose sum is σ = 2821538. Its totient is φ = 2821536.

The previous prime is 2821517. The next prime is 2821543. The reversal of 2821537 is 7351282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2509056 + 312481 = 1584^2 + 559^2 .

It is a cyclic number.

It is not a de Polignac number, because 2821537 - 2¹¹ = 2819489 is a prime.

It is a super-2 number, since 2×2821537² = 15922142084738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2821517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1410768 + 1410769.

It is an arithmetic number, because the mean of its divisors is an integer number (1410769).

2^2821537 is an apocalyptic number.

It is an amenable number.

2821537 is a deficient number, since it is larger than the sum of its proper divisors (1).

2821537 is an equidigital number, since it uses as much as digits as its factorization.

2821537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 28.

The square root of 2821537 is about 1679.7431351251. The cubic root of 2821537 is about 141.3064274511.

The spelling of 2821537 in words is "two million, eight hundred twenty-one thousand, five hundred thirty-seven".