102621005 has 32 divisors (see below), whose sum is σ = 132295680. Its totient is φ = 76285440.

The previous prime is 102620939. The next prime is 102621011. The reversal of 102621005 is 500126201.

It is a de Polignac number, because none of the positive numbers 2^k-102621005 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 593099 + ... + 593271.

It is an arithmetic number, because the mean of its divisors is an integer number (4134240).

Almost surely, 2^102621005 is an apocalyptic number.

It is an amenable number.

102621005 is a deficient number, since it is larger than the sum of its proper divisors (29674675).

102621005 is a wasteful number, since it uses less digits than its factorization.

102621005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 102621005 is about 10130.2026139658. The cubic root of 102621005 is about 468.1791705063.

Adding to 102621005 its reverse (500126201), we get a palindrome (602747206).

The spelling of 102621005 in words is "one hundred two million, six hundred twenty-one thousand, five".