101645242 has 4 divisors (see below), whose sum is σ = 152467866. Its totient is φ = 50822620.

The previous prime is 101645239. The next prime is 101645263. The reversal of 101645242 is 242546101.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 76755121 + 24890121 = 8761^2 + 4989^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25411309 + ... + 25411312.

Almost surely, 2^101645242 is an apocalyptic number.

101645242 is a deficient number, since it is larger than the sum of its proper divisors (50822624).

101645242 is an equidigital number, since it uses as much as digits as its factorization.

101645242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50822623.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 101645242 is about 10081.9265024101. The cubic root of 101645242 is about 466.6905619284.

The spelling of 101645242 in words is "one hundred one million, six hundred forty-five thousand, two hundred forty-two".