427221445 has 12 divisors (see below), whose sum is σ = 596366604. Its totient is φ = 292951680.

The previous prime is 427221439. The next prime is 427221461. The reversal of 427221445 is 544122724.

It can be written as a sum of positive squares in 2 ways, for example, as 139783329 + 287438116 = 11823^2 + 16954^2 .

It is not a de Polignac number, because 427221445 - 2³ = 427221437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 871636 + ... + 872125.

It is an arithmetic number, because the mean of its divisors is an integer number (49697217).

Almost surely, 2^427221445 is an apocalyptic number.

It is an amenable number.

427221445 is a deficient number, since it is larger than the sum of its proper divisors (169145159).

427221445 is a wasteful number, since it uses less digits than its factorization.

427221445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743780 (or 1743773 counting only the distinct ones).

The product of its digits is 17920, while the sum is 31.

The square root of 427221445 is about 20669.3358625767. The cubic root of 427221445 is about 753.1549732853.

The spelling of 427221445 in words is "four hundred twenty-seven million, two hundred twenty-one thousand, four hundred forty-five".