42401224 has 8 divisors (see below), whose sum is σ = 79502310. Its totient is φ = 21200608.

The previous prime is 42401209. The next prime is 42401231. The reversal of 42401224 is 42210424.

It can be written as a sum of positive squares in only one way, i.e., 33292900 + 9108324 = 5770^2 + 3018^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2650069 + ... + 2650084.

Almost surely, 2^42401224 is an apocalyptic number.

It is an amenable number.

42401224 is a deficient number, since it is larger than the sum of its proper divisors (37101086).

42401224 is a wasteful number, since it uses less digits than its factorization.

42401224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5300159 (or 5300155 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 42401224 is about 6511.6222249145. The cubic root of 42401224 is about 348.7060356616.

Adding to 42401224 its reverse (42210424), we get a palindrome (84611648).

The spelling of 42401224 in words is "forty-two million, four hundred one thousand, two hundred twenty-four".