42545730 has 32 divisors (see below), whose sum is σ = 108117504. Its totient is φ = 10678016.

The previous prime is 42545729. The next prime is 42545749. The reversal of 42545730 is 3754524.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 41202 + ... + 42221.

It is an arithmetic number, because the mean of its divisors is an integer number (3378672).

Almost surely, 2^42545730 is an apocalyptic number.

42545730 is an abundant number, since it is smaller than the sum of its proper divisors (65571774).

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

42545730 is a wasteful number, since it uses less digits than its factorization.

42545730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83450.

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 42545730 is about 6522.7087931319. The cubic root of 42545730 is about 349.1017237540.

Subtracting from 42545730 its sum of digits (30), we obtain a triangular number (42545700 = T₉₂₂₄).

The spelling of 42545730 in words is "forty-two million, five hundred forty-five thousand, seven hundred thirty".