102051621 has 24 divisors (see below), whose sum is σ = 175793280. Its totient is φ = 55778976.

The previous prime is 102051569. The next prime is 102051623. The reversal of 102051621 is 126150201.

It is not a de Polignac number, because 102051621 - 2⁶ = 102051557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102051594 and 102051603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102051623) 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 in 23 ways as a sum of consecutive naturals, for example, 33766 + ... + 36663.

It is an arithmetic number, because the mean of its divisors is an integer number (7324720).

Almost surely, 2^102051621 is an apocalyptic number.

It is an amenable number.

102051621 is a deficient number, since it is larger than the sum of its proper divisors (73741659).

102051621 is a wasteful number, since it uses less digits than its factorization.

102051621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70465 (or 70462 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 102051621 is about 10102.0602354173. The cubic root of 102051621 is about 467.3116798959.

The spelling of 102051621 in words is "one hundred two million, fifty-one thousand, six hundred twenty-one".