102002135461 has 2 divisors, whose sum is σ = 102002135462. Its totient is φ = 102002135460.

The previous prime is 102002135441. The next prime is 102002135497. The reversal of 102002135461 is 164531200201.

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., 77944264225 + 24057871236 = 279185^2 + 155106^2 .

It is a cyclic number.

It is not a de Polignac number, because 102002135461 - 2¹⁷ = 102002004389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102002135441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51001067730 + 51001067731.

It is an arithmetic number, because the mean of its divisors is an integer number (51001067731).

Almost surely, 2^102002135461 is an apocalyptic number.

It is an amenable number.

102002135461 is a deficient number, since it is larger than the sum of its proper divisors (1).

102002135461 is an equidigital number, since it uses as much as digits as its factorization.

102002135461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 102002135461 its reverse (164531200201), we get a palindrome (266533335662).

The spelling of 102002135461 in words is "one hundred two billion, two million, one hundred thirty-five thousand, four hundred sixty-one".