42745530 has 16 divisors (see below), whose sum is σ = 102589344. Its totient is φ = 11398800.

The previous prime is 42745529. The next prime is 42745541. The reversal of 42745530 is 3554724.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1424851 = 42745530 / (4 + 2 + 7 + 4 + 5 + 5 + 3 + 0).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 712396 + ... + 712455.

It is an arithmetic number, because the mean of its divisors is an integer number (6411834).

Almost surely, 2^42745530 is an apocalyptic number.

42745530 is an abundant number, since it is smaller than the sum of its proper divisors (59843814).

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

42745530 is a wasteful number, since it uses less digits than its factorization.

42745530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424861.

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

The square root of 42745530 is about 6538.0065769315. The cubic root of 42745530 is about 349.6473454704.

The spelling of 42745530 in words is "forty-two million, seven hundred forty-five thousand, five hundred thirty".