7098521 has 2 divisors, whose sum is σ = 7098522. Its totient is φ = 7098520.

The previous prime is 7098499. The next prime is 7098541. The reversal of 7098521 is 1258907.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5107600 + 1990921 = 2260^2 + 1411^2 .

It is a cyclic number.

It is not a de Polignac number, because 7098521 - 2²² = 2904217 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (7098541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3549260 + 3549261.

It is an arithmetic number, because the mean of its divisors is an integer number (3549261).

Almost surely, 2^7098521 is an apocalyptic number.

It is an amenable number.

7098521 is a deficient number, since it is larger than the sum of its proper divisors (1).

7098521 is an equidigital number, since it uses as much as digits as its factorization.

7098521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 7098521 is about 2664.3049750357. The cubic root of 7098521 is about 192.1863876508.

The spelling of 7098521 in words is "seven million, ninety-eight thousand, five hundred twenty-one".