42502549 has 2 divisors, whose sum is σ = 42502550. Its totient is φ = 42502548.

The previous prime is 42502547. The next prime is 42502561. The reversal of 42502549 is 94520524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42484324 + 18225 = 6518^2 + 135^2 .

It is a cyclic number.

It is not a de Polignac number, because 42502549 - 2¹ = 42502547 is a prime.

Together with 42502547, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 42502549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42502541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21251274 + 21251275.

It is an arithmetic number, because the mean of its divisors is an integer number (21251275).

Almost surely, 2^42502549 is an apocalyptic number.

It is an amenable number.

42502549 is a deficient number, since it is larger than the sum of its proper divisors (1).

42502549 is an equidigital number, since it uses as much as digits as its factorization.

42502549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 42502549 is about 6519.3979016471. The cubic root of 42502549 is about 348.9835790009.

The spelling of 42502549 in words is "forty-two million, five hundred two thousand, five hundred forty-nine".