8542493 has 2 divisors, whose sum is σ = 8542494. Its totient is φ = 8542492.

The previous prime is 8542489. The next prime is 8542519. The reversal of 8542493 is 3942458.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7991929 + 550564 = 2827^2 + 742^2 .

It is a cyclic number.

It is not a de Polignac number, because 8542493 - 2² = 8542489 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8542463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4271246 + 4271247.

It is an arithmetic number, because the mean of its divisors is an integer number (4271247).

Almost surely, 2^8542493 is an apocalyptic number.

It is an amenable number.

8542493 is a deficient number, since it is larger than the sum of its proper divisors (1).

8542493 is an equidigital number, since it uses as much as digits as its factorization.

8542493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 35.

The square root of 8542493 is about 2922.7543516348. The cubic root of 8542493 is about 204.4222718572.

Subtracting from 8542493 its sum of digits (35), we obtain a palindrome (8542458).

The spelling of 8542493 in words is "eight million, five hundred forty-two thousand, four hundred ninety-three".