28602521 has 2 divisors, whose sum is σ = 28602522. Its totient is φ = 28602520.

The previous prime is 28602499. The next prime is 28602523. The reversal of 28602521 is 12520682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19536400 + 9066121 = 4420^2 + 3011^2 .

It is a cyclic number.

It is not a de Polignac number, because 28602521 - 2¹⁴ = 28586137 is a prime.

Together with 28602523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28602523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14301260 + 14301261.

It is an arithmetic number, because the mean of its divisors is an integer number (14301261).

Almost surely, 2^28602521 is an apocalyptic number.

It is an amenable number.

28602521 is a deficient number, since it is larger than the sum of its proper divisors (1).

28602521 is an equidigital number, since it uses as much as digits as its factorization.

28602521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 28602521 is about 5348.1324777907. The cubic root of 28602521 is about 305.8215635616.

The spelling of 28602521 in words is "twenty-eight million, six hundred two thousand, five hundred twenty-one".