102164621 has 4 divisors (see below), whose sum is σ = 110023452. Its totient is φ = 94305792.

The previous prime is 102164609. The next prime is 102164633. The reversal of 102164621 is 126461201.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (102164609) and next prime (102164633).

It can be written as a sum of positive squares in 2 ways, for example, as 22705225 + 79459396 = 4765^2 + 8914^2 .

It is a cyclic number.

It is not a de Polignac number, because 102164621 - 2¹⁰ = 102163597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102164641) 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 3 ways as a sum of consecutive naturals, for example, 3929396 + ... + 3929421.

It is an arithmetic number, because the mean of its divisors is an integer number (27505863).

Almost surely, 2^102164621 is an apocalyptic number.

It is an amenable number.

102164621 is a deficient number, since it is larger than the sum of its proper divisors (7858831).

102164621 is an equidigital number, since it uses as much as digits as its factorization.

102164621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7858830.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 102164621 is about 10107.6516065800. The cubic root of 102164621 is about 467.4840983276.

The spelling of 102164621 in words is "one hundred two million, one hundred sixty-four thousand, six hundred twenty-one".