111421757 has 8 divisors (see below), whose sum is σ = 124185600. Its totient is φ = 99347904.

The previous prime is 111421721. The next prime is 111421759. The reversal of 111421757 is 757124111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111421757 - 2⁶ = 111421693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111421759) 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 7 ways as a sum of consecutive naturals, for example, 172157 + ... + 172802.

It is an arithmetic number, because the mean of its divisors is an integer number (15523200).

Almost surely, 2^111421757 is an apocalyptic number.

111421757 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

111421757 is a deficient number, since it is larger than the sum of its proper divisors (12763843).

111421757 is a wasteful number, since it uses less digits than its factorization.

111421757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344995.

The product of its digits is 1960, while the sum is 29.

The square root of 111421757 is about 10555.6504773510. The cubic root of 111421757 is about 481.1974687812.

Adding to 111421757 its reverse (757124111), we get a palindrome (868545868).

The spelling of 111421757 in words is "one hundred eleven million, four hundred twenty-one thousand, seven hundred fifty-seven".