2521747 has 2 divisors, whose sum is σ = 2521748. Its totient is φ = 2521746.

The previous prime is 2521733. The next prime is 2521751. The reversal of 2521747 is 7471252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2521747 - 2¹⁹ = 1997459 is a prime.

It is an Ulam number.

It is equal to p₁₈₄₅₃₇ and since 2521747 and 184537 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (2521147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260873 + 1260874.

It is an arithmetic number, because the mean of its divisors is an integer number (1260874).

2^2521747 is an apocalyptic number.

2521747 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521747 is an equidigital number, since it uses as much as digits as its factorization.

2521747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3920, while the sum is 28.

The square root of 2521747 is about 1588.0009445841. Note that the first 3 decimals coincide. The cubic root of 2521747 is about 136.1132814808.

Adding to 2521747 its reverse (7471252), we get a palindrome (9992999).

The spelling of 2521747 in words is "two million, five hundred twenty-one thousand, seven hundred forty-seven".