42153530 has 32 divisors (see below), whose sum is σ = 79140240. Its totient is φ = 16145920.

The previous prime is 42153493. The next prime is 42153541. The reversal of 42153530 is 3535124.

It can be written as a sum of positive squares in 8 ways, for example, as 23843689 + 18309841 = 4883^2 + 4279^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42153496 and 42153505.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39200 + ... + 40260.

Almost surely, 2^42153530 is an apocalyptic number.

42153530 is a deficient number, since it is larger than the sum of its proper divisors (36986710).

42153530 is a wasteful number, since it uses less digits than its factorization.

42153530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 42153530 is about 6492.5749899404. The cubic root of 42153530 is about 348.0257005285.

Adding to 42153530 its reverse (3535124), we get a palindrome (45688654).

The spelling of 42153530 in words is "forty-two million, one hundred fifty-three thousand, five hundred thirty".