6542551 has 2 divisors, whose sum is σ = 6542552. Its totient is φ = 6542550.

The previous prime is 6542537. The next prime is 6542561. The reversal of 6542551 is 1552456.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6542551 - 2⁷ = 6542423 is a prime.

6542551 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6542531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3271275 + 3271276.

It is an arithmetic number, because the mean of its divisors is an integer number (3271276).

Almost surely, 2^6542551 is an apocalyptic number.

6542551 is a deficient number, since it is larger than the sum of its proper divisors (1).

6542551 is an equidigital number, since it uses as much as digits as its factorization.

6542551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6000, while the sum is 28.

The square root of 6542551 is about 2557.8410818501. The cubic root of 6542551 is about 187.0319085360.

The spelling of 6542551 in words is "six million, five hundred forty-two thousand, five hundred fifty-one".