101420243 has 4 divisors (see below), whose sum is σ = 101557488. Its totient is φ = 101283000.

The previous prime is 101420239. The next prime is 101420281. The reversal of 101420243 is 342024101.

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 101420243 - 2² = 101420239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101420443) 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, 67508 + ... + 68993.

It is an arithmetic number, because the mean of its divisors is an integer number (25389372).

Almost surely, 2^101420243 is an apocalyptic number.

101420243 is a deficient number, since it is larger than the sum of its proper divisors (137245).

101420243 is an equidigital number, since it uses as much as digits as its factorization.

101420243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137244.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 101420243 is about 10070.7617884647. The cubic root of 101420243 is about 466.3459565744.

Adding to 101420243 its reverse (342024101), we get a palindrome (443444344).

The spelling of 101420243 in words is "one hundred one million, four hundred twenty thousand, two hundred forty-three".