427220642 has 16 divisors (see below), whose sum is σ = 678934872. Its totient is φ = 200924160.

The previous prime is 427220639. The next prime is 427220657. The reversal of 427220642 is 246022724.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 384983641 + 42237001 = 19621^2 + 6499^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81542 + ... + 86622.

Almost surely, 2^427220642 is an apocalyptic number.

427220642 is a deficient number, since it is larger than the sum of its proper divisors (251714230).

427220642 is a wasteful number, since it uses less digits than its factorization.

427220642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7573.

The product of its (nonzero) digits is 10752, while the sum is 29.

The square root of 427220642 is about 20669.3164376571. The cubic root of 427220642 is about 753.1545014115.

The spelling of 427220642 in words is "four hundred twenty-seven million, two hundred twenty thousand, six hundred forty-two".