42540429 has 8 divisors (see below), whose sum is σ = 57006400. Its totient is φ = 28217376.

The previous prime is 42540413. The next prime is 42540437. The reversal of 42540429 is 92404524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42540429 - 2⁴ = 42540413 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42540396 and 42540405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42540529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35032 + ... + 36225.

It is an arithmetic number, because the mean of its divisors is an integer number (7125800).

Almost surely, 2^42540429 is an apocalyptic number.

It is an amenable number.

42540429 is a deficient number, since it is larger than the sum of its proper divisors (14465971).

42540429 is a wasteful number, since it uses less digits than its factorization.

42540429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71459.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 42540429 is about 6522.3024308905. The cubic root of 42540429 is about 349.0872243350.

The spelling of 42540429 in words is "forty-two million, five hundred forty thousand, four hundred twenty-nine".