427240081 has 4 divisors (see below), whose sum is σ = 428864832. Its totient is φ = 425615332.

The previous prime is 427240031. The next prime is 427240133. The reversal of 427240081 is 180042724.

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 427240081 - 2¹⁷ = 427109009 is a prime.

It is a super-2 number, since 2×427240081² = 365068173625773122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427240031) 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, 811981 + ... + 812506.

It is an arithmetic number, because the mean of its divisors is an integer number (107216208).

Almost surely, 2^427240081 is an apocalyptic number.

It is an amenable number.

427240081 is a deficient number, since it is larger than the sum of its proper divisors (1624751).

427240081 is a wasteful number, since it uses less digits than its factorization.

427240081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624750.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 427240081 is about 20669.7866704037. The cubic root of 427240081 is about 753.1659243523.

The spelling of 427240081 in words is "four hundred twenty-seven million, two hundred forty thousand, eighty-one".