102421136 has 20 divisors (see below), whose sum is σ = 200489772. Its totient is φ = 50681856.

The previous prime is 102421133. The next prime is 102421159. The reversal of 102421136 is 631124201.

It can be written as a sum of positive squares in 2 ways, for example, as 61716736 + 40704400 = 7856^2 + 6380^2 .

It is not an unprimeable number, because it can be changed into a prime (102421133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31445 + ... + 34548.

Almost surely, 2^102421136 is an apocalyptic number.

102421136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

102421136 is a deficient number, since it is larger than the sum of its proper divisors (98068636).

102421136 is an equidigital number, since it uses as much as digits as its factorization.

102421136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66098 (or 66092 counting only the distinct ones).

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

The square root of 102421136 is about 10120.3328008520. The cubic root of 102421136 is about 467.8750244616.

Adding to 102421136 its reverse (631124201), we get a palindrome (733545337).

The spelling of 102421136 in words is "one hundred two million, four hundred twenty-one thousand, one hundred thirty-six".