42540135 has 32 divisors (see below), whose sum is σ = 74580480. Its totient is φ = 20534400.

The previous prime is 42540101. The next prime is 42540139. The reversal of 42540135 is 53104524.

It is not a de Polignac number, because 42540135 - 2¹⁰ = 42539111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42540139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50901 + ... + 51729.

It is an arithmetic number, because the mean of its divisors is an integer number (2330640).

Almost surely, 2^42540135 is an apocalyptic number.

42540135 is a deficient number, since it is larger than the sum of its proper divisors (32040345).

42540135 is a wasteful number, since it uses less digits than its factorization.

42540135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 42540135 is about 6522.2798927982. The cubic root of 42540135 is about 349.0864201441.

Adding to 42540135 its reverse (53104524), we get a palindrome (95644659).

The spelling of 42540135 in words is "forty-two million, five hundred forty thousand, one hundred thirty-five".