42366621 has 16 divisors (see below), whose sum is σ = 64304640. Its totient is φ = 24559920.

The previous prime is 42366619. The next prime is 42366631. The reversal of 42366621 is 12666324.

It is not a de Polignac number, because 42366621 - 2¹ = 42366619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42366631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27151 + ... + 28668.

It is an arithmetic number, because the mean of its divisors is an integer number (4019040).

Almost surely, 2^42366621 is an apocalyptic number.

It is an amenable number.

42366621 is a deficient number, since it is larger than the sum of its proper divisors (21938019).

42366621 is a wasteful number, since it uses less digits than its factorization.

42366621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55856.

The product of its digits is 10368, while the sum is 30.

The square root of 42366621 is about 6508.9646642150. The cubic root of 42366621 is about 348.6111519321.

It can be divided in two parts, 42 and 366621, that added together give a palindrome (366663).

The spelling of 42366621 in words is "forty-two million, three hundred sixty-six thousand, six hundred twenty-one".