102724243 has 4 divisors (see below), whose sum is σ = 103404688. Its totient is φ = 102043800.

The previous prime is 102724211. The next prime is 102724267. The reversal of 102724243 is 342427201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342427201 = 1427 ⋅239963.

It is a cyclic number.

It is not a de Polignac number, because 102724243 - 2⁵ = 102724211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102724273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339996 + ... + 340297.

It is an arithmetic number, because the mean of its divisors is an integer number (25851172).

Almost surely, 2^102724243 is an apocalyptic number.

102724243 is a deficient number, since it is larger than the sum of its proper divisors (680445).

102724243 is an equidigital number, since it uses as much as digits as its factorization.

102724243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680444.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 102724243 is about 10135.2968876102. The cubic root of 102724243 is about 468.3361159000.

The spelling of 102724243 in words is "one hundred two million, seven hundred twenty-four thousand, two hundred forty-three".