42451216 has 20 divisors (see below), whose sum is σ = 82503772. Its totient is φ = 21159936.

The previous prime is 42451207. The next prime is 42451219. The reversal of 42451216 is 61215424.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5290000 + 37161216 = 2300^2 + 6096^2 .

It is not an unprimeable number, because it can be changed into a prime (42451219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1456 + ... + 9328.

Almost surely, 2^42451216 is an apocalyptic number.

It is an amenable number.

42451216 is a deficient number, since it is larger than the sum of its proper divisors (40052556).

42451216 is a wasteful number, since it uses less digits than its factorization.

42451216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8218 (or 8212 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 42451216 is about 6515.4597688881. The cubic root of 42451216 is about 348.8430259327.

The spelling of 42451216 in words is "forty-two million, four hundred fifty-one thousand, two hundred sixteen".