9102421 has 2 divisors, whose sum is σ = 9102422. Its totient is φ = 9102420.

The previous prime is 9102403. The next prime is 9102439. The reversal of 9102421 is 1242019.

It is a balanced prime because it is at equal distance from previous prime (9102403) and next prime (9102439).

It can be written as a sum of positive squares in only one way, i.e., 9084196 + 18225 = 3014^2 + 135^2 .

It is a cyclic number.

It is not a de Polignac number, because 9102421 - 2⁹ = 9101909 is a prime.

It is a super-2 number, since 2×9102421² = 165708136122482, which contains 22 as substring.

9102421 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9103421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4551210 + 4551211.

It is an arithmetic number, because the mean of its divisors is an integer number (4551211).

Almost surely, 2^9102421 is an apocalyptic number.

It is an amenable number.

9102421 is a deficient number, since it is larger than the sum of its proper divisors (1).

9102421 is an equidigital number, since it uses as much as digits as its factorization.

9102421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 9102421 is about 3017.0218759565. The cubic root of 9102421 is about 208.7944607511.

The spelling of 9102421 in words is "nine million, one hundred two thousand, four hundred twenty-one".