102546421 has 2 divisors, whose sum is σ = 102546422. Its totient is φ = 102546420.

The previous prime is 102546391. The next prime is 102546559. The reversal of 102546421 is 124645201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101727396 + 819025 = 10086^2 + 905^2 .

It is a cyclic number.

It is not a de Polignac number, because 102546421 - 2⁹ = 102545909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102546221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51273210 + 51273211.

It is an arithmetic number, because the mean of its divisors is an integer number (51273211).

Almost surely, 2^102546421 is an apocalyptic number.

It is an amenable number.

102546421 is a deficient number, since it is larger than the sum of its proper divisors (1).

102546421 is an equidigital number, since it uses as much as digits as its factorization.

102546421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 102546421 is about 10126.5206759281. The cubic root of 102546421 is about 468.0657202493.

The spelling of 102546421 in words is "one hundred two million, five hundred forty-six thousand, four hundred twenty-one".