42657540 has 24 divisors (see below), whose sum is σ = 119441280. Its totient is φ = 11375328.

The previous prime is 42657523. The next prime is 42657557. The reversal of 42657540 is 4575624.

It is an interprime number because it is at equal distance from previous prime (42657523) and next prime (42657557).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355420 + ... + 355539.

It is an arithmetic number, because the mean of its divisors is an integer number (4976720).

Almost surely, 2^42657540 is an apocalyptic number.

It is an amenable number.

42657540 is an abundant number, since it is smaller than the sum of its proper divisors (76783740).

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

42657540 is a wasteful number, since it uses less digits than its factorization.

42657540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710971 (or 710969 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 33.

The square root of 42657540 is about 6531.2739951712. The cubic root of 42657540 is about 349.4072688750.

The spelling of 42657540 in words is "forty-two million, six hundred fifty-seven thousand, five hundred forty".