427751621 has 8 divisors (see below), whose sum is σ = 470313984. Its totient is φ = 385801920.

The previous prime is 427751563. The next prime is 427751663. The reversal of 427751621 is 126157724.

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

It is a cyclic number.

It is not a de Polignac number, because 427751621 - 2⁶ = 427751557 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 (427751021) 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, 151700 + ... + 154493.

It is an arithmetic number, because the mean of its divisors is an integer number (58789248).

Almost surely, 2^427751621 is an apocalyptic number.

It is an amenable number.

427751621 is a deficient number, since it is larger than the sum of its proper divisors (42562363).

427751621 is a wasteful number, since it uses less digits than its factorization.

427751621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306331.

The product of its digits is 23520, while the sum is 35.

The square root of 427751621 is about 20682.1570683524. The cubic root of 427751621 is about 753.4663961881.

The spelling of 427751621 in words is "four hundred twenty-seven million, seven hundred fifty-one thousand, six hundred twenty-one".