427656561 has 8 divisors (see below), whose sum is σ = 572481504. Its totient is φ = 283968000.

The previous prime is 427656553. The next prime is 427656571. The reversal of 427656561 is 165656724.

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

It is not a de Polignac number, because 427656561 - 2³ = 427656553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (427656521) 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, 283216 + ... + 284721.

It is an arithmetic number, because the mean of its divisors is an integer number (71560188).

Almost surely, 2^427656561 is an apocalyptic number.

It is an amenable number.

427656561 is a deficient number, since it is larger than the sum of its proper divisors (144824943).

427656561 is a wasteful number, since it uses less digits than its factorization.

427656561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568191.

The product of its digits is 302400, while the sum is 42.

The square root of 427656561 is about 20679.8588244698. The cubic root of 427656561 is about 753.4105773293.

The spelling of 427656561 in words is "four hundred twenty-seven million, six hundred fifty-six thousand, five hundred sixty-one".