102442251 has 8 divisors (see below), whose sum is σ = 136687824. Its totient is φ = 68245760.

The previous prime is 102442247. The next prime is 102442303. The reversal of 102442251 is 152244201.

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

It is a cyclic number.

It is not a de Polignac number, because 102442251 - 2² = 102442247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102442201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7086 + ... + 15971.

It is an arithmetic number, because the mean of its divisors is an integer number (17085978).

Almost surely, 2^102442251 is an apocalyptic number.

102442251 is a deficient number, since it is larger than the sum of its proper divisors (34245573).

102442251 is a wasteful number, since it uses less digits than its factorization.

102442251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24541.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 102442251 is about 10121.3759440108. The cubic root of 102442251 is about 467.9071744088.

Adding to 102442251 its reverse (152244201), we get a palindrome (254686452).

The spelling of 102442251 in words is "one hundred two million, four hundred forty-two thousand, two hundred fifty-one".