102151243 has 4 divisors (see below), whose sum is σ = 103882680. Its totient is φ = 100419808.

The previous prime is 102151241. The next prime is 102151267. The reversal of 102151243 is 342151201.

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

It is a cyclic number.

It is not a de Polignac number, because 102151243 - 2¹ = 102151241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102151243.

It is not an unprimeable number, because it can be changed into a prime (102151241) 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, 865630 + ... + 865747.

It is an arithmetic number, because the mean of its divisors is an integer number (25970670).

Almost surely, 2^102151243 is an apocalyptic number.

102151243 is a deficient number, since it is larger than the sum of its proper divisors (1731437).

102151243 is an equidigital number, since it uses as much as digits as its factorization.

102151243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731436.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 102151243 is about 10106.9898090381. The cubic root of 102151243 is about 467.4636924533.

The spelling of 102151243 in words is "one hundred two million, one hundred fifty-one thousand, two hundred forty-three".