427752621 has 12 divisors (see below), whose sum is σ = 618477600. Its totient is φ = 284885640.

The previous prime is 427752607. The next prime is 427752629. The reversal of 427752621 is 126257724.

It is a happy number.

427752621 is a `hidden beast` number, since 4 + 27 + 7 + 5 + 2 + 621 = 666.

It is not a de Polignac number, because 427752621 - 2⁹ = 427752109 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427752629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13771 + ... + 32328.

It is an arithmetic number, because the mean of its divisors is an integer number (51539800).

Almost surely, 2^427752621 is an apocalyptic number.

It is an amenable number.

427752621 is a deficient number, since it is larger than the sum of its proper divisors (190724979).

427752621 is a wasteful number, since it uses less digits than its factorization.

427752621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47136 (or 47133 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 427752621 is about 20682.1812437663. The cubic root of 427752621 is about 753.4669833402.

The spelling of 427752621 in words is "four hundred twenty-seven million, seven hundred fifty-two thousand, six hundred twenty-one".