102621226 has 4 divisors (see below), whose sum is σ = 153931842. Its totient is φ = 51310612.

The previous prime is 102621203. The next prime is 102621251. The reversal of 102621226 is 622126201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 622126201 = 7219 ⋅86179.

It can be written as a sum of positive squares in only one way, i.e., 90725625 + 11895601 = 9525^2 + 3449^2 .

It is a super-2 number, since 2×102621226² = 21062232051486152, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 102621197 and 102621206.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25655305 + ... + 25655308.

Almost surely, 2^102621226 is an apocalyptic number.

102621226 is a deficient number, since it is larger than the sum of its proper divisors (51310616).

102621226 is an equidigital number, since it uses as much as digits as its factorization.

102621226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51310615.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 102621226 is about 10130.2135219353. The cubic root of 102621226 is about 468.1795065893.

Adding to 102621226 its reverse (622126201), we get a palindrome (724747427).

The spelling of 102621226 in words is "one hundred two million, six hundred twenty-one thousand, two hundred twenty-six".