102351421 has 2 divisors, whose sum is σ = 102351422. Its totient is φ = 102351420.

The previous prime is 102351413. The next prime is 102351433. The reversal of 102351421 is 124153201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91202500 + 11148921 = 9550^2 + 3339^2 .

It is a cyclic number.

It is not a de Polignac number, because 102351421 - 2³ = 102351413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102351401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51175710 + 51175711.

It is an arithmetic number, because the mean of its divisors is an integer number (51175711).

Almost surely, 2^102351421 is an apocalyptic number.

It is an amenable number.

102351421 is a deficient number, since it is larger than the sum of its proper divisors (1).

102351421 is an equidigital number, since it uses as much as digits as its factorization.

102351421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 102351421 is about 10116.8879108153. The cubic root of 102351421 is about 467.7688441943.

The spelling of 102351421 in words is "one hundred two million, three hundred fifty-one thousand, four hundred twenty-one".