102621206 has 4 divisors (see below), whose sum is σ = 153931812. Its totient is φ = 51310602.

The previous prime is 102621203. The next prime is 102621251. The reversal of 102621206 is 602126201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 602126201 = 2671 ⋅225431.

It is a super-2 number, since 2×102621206² = 21062223841788872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102621203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25655300 + ... + 25655303.

It is an arithmetic number, because the mean of its divisors is an integer number (38482953).

Almost surely, 2^102621206 is an apocalyptic number.

102621206 is a deficient number, since it is larger than the sum of its proper divisors (51310606).

102621206 is an equidigital number, since it uses as much as digits as its factorization.

102621206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51310605.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 102621206 is about 10130.2125347892. The cubic root of 102621206 is about 468.1794761746.

Adding to 102621206 its reverse (602126201), we get a palindrome (704747407).

The spelling of 102621206 in words is "one hundred two million, six hundred twenty-one thousand, two hundred six".