102985251 has 8 divisors (see below), whose sum is σ = 137368320. Its totient is φ = 68629512.

The previous prime is 102985247. The next prime is 102985273. The reversal of 102985251 is 152589201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102985251 - 2² = 102985247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102985151) 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 7 ways as a sum of consecutive naturals, for example, 4786 + ... + 15128.

It is an arithmetic number, because the mean of its divisors is an integer number (17171040).

Almost surely, 2^102985251 is an apocalyptic number.

102985251 is a deficient number, since it is larger than the sum of its proper divisors (34383069).

102985251 is a wasteful number, since it uses less digits than its factorization.

102985251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13665.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 102985251 is about 10148.1649080018. The cubic root of 102985251 is about 468.7324393777.

The spelling of 102985251 in words is "one hundred two million, nine hundred eighty-five thousand, two hundred fifty-one".