427880121 has 4 divisors (see below), whose sum is σ = 570506832. Its totient is φ = 285253412.

The previous prime is 427880111. The next prime is 427880129. The reversal of 427880121 is 121088724.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 427880121 - 2¹⁸ = 427617977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (427880129) 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, 71313351 + ... + 71313356.

It is an arithmetic number, because the mean of its divisors is an integer number (142626708).

Almost surely, 2^427880121 is an apocalyptic number.

It is an amenable number.

427880121 is a deficient number, since it is larger than the sum of its proper divisors (142626711).

427880121 is a wasteful number, since it uses less digits than its factorization.

427880121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142626710.

The product of its (nonzero) digits is 7168, while the sum is 33.

The square root of 427880121 is about 20685.2633775836. The cubic root of 427880121 is about 753.5418377400.

The spelling of 427880121 in words is "four hundred twenty-seven million, eight hundred eighty thousand, one hundred twenty-one".