2297521 has 2 divisors, whose sum is σ = 2297522. Its totient is φ = 2297520.

The previous prime is 2297509. The next prime is 2297543. The reversal of 2297521 is 1257922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2283121 + 14400 = 1511^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 2297521 - 2¹¹ = 2295473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2297521.

It is not a weakly prime, because it can be changed into another prime (2297591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1148760 + 1148761.

It is an arithmetic number, because the mean of its divisors is an integer number (1148761).

2^2297521 is an apocalyptic number.

It is an amenable number.

2297521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2297521 is an equidigital number, since it uses as much as digits as its factorization.

2297521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 28.

The square root of 2297521 is about 1515.7575663674. The cubic root of 2297521 is about 131.9531705631.

It can be divided in two parts, 229 and 7521, that added together give a triangular number (7750 = T₁₂₄).

The spelling of 2297521 in words is "two million, two hundred ninety-seven thousand, five hundred twenty-one".