116642251 has 4 divisors (see below), whose sum is σ = 127246104. Its totient is φ = 106038400.

The previous prime is 116642249. The next prime is 116642293. The reversal of 116642251 is 152246611.

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 116642251 - 2¹ = 116642249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (116642231) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 5301910 + ... + 5301931.

It is an arithmetic number, because the mean of its divisors is an integer number (31811526).

Almost surely, 2^116642251 is an apocalyptic number.

116642251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

116642251 is a deficient number, since it is larger than the sum of its proper divisors (10603853).

116642251 is a wasteful number, since it uses less digits than its factorization.

116642251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10603852.

The product of its digits is 2880, while the sum is 28.

The square root of 116642251 is about 10800.1042124602. The cubic root of 116642251 is about 488.5983140502.

Adding to 116642251 its reverse (152246611), we get a palindrome (268888862).

The spelling of 116642251 in words is "one hundred sixteen million, six hundred forty-two thousand, two hundred fifty-one".