102391106 has 4 divisors (see below), whose sum is σ = 153586662. Its totient is φ = 51195552.

The previous prime is 102391103. The next prime is 102391129. The reversal of 102391106 is 601193201.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 101505625 + 885481 = 10075^2 + 941^2 .

It is not an unprimeable number, because it can be changed into a prime (102391103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25597775 + ... + 25597778.

Almost surely, 2^102391106 is an apocalyptic number.

102391106 is a deficient number, since it is larger than the sum of its proper divisors (51195556).

102391106 is an equidigital number, since it uses as much as digits as its factorization.

102391106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51195555.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 102391106 is about 10118.8490452225. The cubic root of 102391106 is about 467.8292928189.

It can be divided in two parts, 1023 and 91106, that added together give a palindrome (92129).

The spelling of 102391106 in words is "one hundred two million, three hundred ninety-one thousand, one hundred six".