102136451 has 4 divisors (see below), whose sum is σ = 102275400. Its totient is φ = 101997504.

The previous prime is 102136439. The next prime is 102136469. The reversal of 102136451 is 154631201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102136451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102130451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68366 + ... + 69843.

It is an arithmetic number, because the mean of its divisors is an integer number (25568850).

Almost surely, 2^102136451 is an apocalyptic number.

102136451 is a deficient number, since it is larger than the sum of its proper divisors (138949).

102136451 is an equidigital number, since it uses as much as digits as its factorization.

102136451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138948.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 102136451 is about 10106.2580117470. The cubic root of 102136451 is about 467.4411276871.

Adding to 102136451 its reverse (154631201), we get a palindrome (256767652).

The spelling of 102136451 in words is "one hundred two million, one hundred thirty-six thousand, four hundred fifty-one".