42504540 has 48 divisors (see below), whose sum is σ = 128169888. Its totient is φ = 10462464.

The previous prime is 42504533. The next prime is 42504547. The reversal of 42504540 is 4540524.

It is an interprime number because it is at equal distance from previous prime (42504533) and next prime (42504547).

It is a super-2 number, since 2×42504540² = 3613271841223200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42504540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42504547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26467 + ... + 28026.

It is an arithmetic number, because the mean of its divisors is an integer number (2670206).

Almost surely, 2^42504540 is an apocalyptic number.

It is an amenable number.

42504540 is an abundant number, since it is smaller than the sum of its proper divisors (85665348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42504540 is a wasteful number, since it uses less digits than its factorization.

42504540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54518 (or 54516 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 42504540 is about 6519.5505980090. The cubic root of 42504540 is about 348.9890282071.

The spelling of 42504540 in words is "forty-two million, five hundred four thousand, five hundred forty".