102621065 has 4 divisors (see below), whose sum is σ = 123145284. Its totient is φ = 82096848.

The previous prime is 102621047. The next prime is 102621089. The reversal of 102621065 is 560126201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 560126201 = 523 ⋅1070987.

It can be written as a sum of positive squares in 2 ways, for example, as 13053769 + 89567296 = 3613^2 + 9464^2 .

It is a cyclic number.

It is not a de Polignac number, because 102621065 - 2²² = 98426761 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102621065.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10262102 + ... + 10262111.

It is an arithmetic number, because the mean of its divisors is an integer number (30786321).

Almost surely, 2^102621065 is an apocalyptic number.

It is an amenable number.

102621065 is a deficient number, since it is larger than the sum of its proper divisors (20524219).

102621065 is an equidigital number, since it uses as much as digits as its factorization.

102621065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20524218.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 102621065 is about 10130.2055754067. The cubic root of 102621065 is about 468.1792617506.

Adding to 102621065 its reverse (560126201), we get a palindrome (662747266).

The spelling of 102621065 in words is "one hundred two million, six hundred twenty-one thousand, sixty-five".