117421287 has 8 divisors (see below), whose sum is σ = 158112240. Its totient is φ = 77505600.

The previous prime is 117421277. The next prime is 117421309. The reversal of 117421287 is 782124711.

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

It is not a de Polignac number, because 117421287 - 2¹⁶ = 117355751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117421217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193462 + ... + 194067.

It is an arithmetic number, because the mean of its divisors is an integer number (19764030).

Almost surely, 2^117421287 is an apocalyptic number.

117421287 is a deficient number, since it is larger than the sum of its proper divisors (40690953).

117421287 is a wasteful number, since it uses less digits than its factorization.

117421287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387633.

The product of its digits is 6272, while the sum is 33.

The square root of 117421287 is about 10836.1103261272. The cubic root of 117421287 is about 489.6836594847.

Adding to 117421287 its reverse (782124711), we get a palindrome (899545998).

The spelling of 117421287 in words is "one hundred seventeen million, four hundred twenty-one thousand, two hundred eighty-seven".