121764127 has 4 divisors (see below), whose sum is σ = 125962920. Its totient is φ = 117565336.

The previous prime is 121764119. The next prime is 121764131. The reversal of 121764127 is 721467121.

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 121764127 - 2³ = 121764119 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 (121764157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2099353 + ... + 2099410.

It is an arithmetic number, because the mean of its divisors is an integer number (31490730).

Almost surely, 2^121764127 is an apocalyptic number.

121764127 is a deficient number, since it is larger than the sum of its proper divisors (4198793).

121764127 is an equidigital number, since it uses as much as digits as its factorization.

121764127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4198792.

The product of its digits is 4704, while the sum is 31.

The square root of 121764127 is about 11034.6783822638. The cubic root of 121764127 is about 495.6477280469.

The spelling of 121764127 in words is "one hundred twenty-one million, seven hundred sixty-four thousand, one hundred twenty-seven".