42515450 has 48 divisors (see below), whose sum is σ = 82863000. Its totient is φ = 16208640.

The previous prime is 42515449. The next prime is 42515491. The reversal of 42515450 is 5451524.

It can be written as a sum of positive squares in 12 ways, for example, as 434281 + 42081169 = 659^2 + 6487^2 .

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 157916 + ... + 158184.

Almost surely, 2^42515450 is an apocalyptic number.

42515450 is a deficient number, since it is larger than the sum of its proper divisors (40347550).

42515450 is a wasteful number, since it uses less digits than its factorization.

42515450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419 (or 414 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 42515450 is about 6520.3872584380. The cubic root of 42515450 is about 349.0188849752.

Adding to 42515450 its reverse (5451524), we get a palindrome (47966974).

The spelling of 42515450 in words is "forty-two million, five hundred fifteen thousand, four hundred fifty".