102491112 has 16 divisors (see below), whose sum is σ = 256227840. Its totient is φ = 34163696.

The previous prime is 102491071. The next prime is 102491117. The reversal of 102491112 is 211194201.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (102491117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2135208 + ... + 2135255.

It is an arithmetic number, because the mean of its divisors is an integer number (16014240).

Almost surely, 2^102491112 is an apocalyptic number.

102491112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

102491112 is an abundant number, since it is smaller than the sum of its proper divisors (153736728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102491112 is a wasteful number, since it uses less digits than its factorization.

102491112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4270472 (or 4270468 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 102491112 is about 10123.7894091096. The cubic root of 102491112 is about 467.9815538058.

The spelling of 102491112 in words is "one hundred two million, four hundred ninety-one thousand, one hundred twelve".