117127421 has 4 divisors (see below), whose sum is σ = 117465312. Its totient is φ = 116789532.

The previous prime is 117127411. The next prime is 117127427. The reversal of 117127421 is 124721711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124721711 = 31 ⋅4023281.

It is a cyclic number.

It is not a de Polignac number, because 117127421 - 2⁶ = 117127357 is a prime.

It is a super-2 number, since 2×117127421² = 27437665500222482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117127427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168425 + ... + 169118.

It is an arithmetic number, because the mean of its divisors is an integer number (29366328).

Almost surely, 2^117127421 is an apocalyptic number.

It is an amenable number.

117127421 is a deficient number, since it is larger than the sum of its proper divisors (337891).

117127421 is an equidigital number, since it uses as much as digits as its factorization.

117127421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337890.

The product of its digits is 784, while the sum is 26.

The square root of 117127421 is about 10822.5422614097. The cubic root of 117127421 is about 489.2748137103.

The spelling of 117127421 in words is "one hundred seventeen million, one hundred twenty-seven thousand, four hundred twenty-one".