42145290 has 48 divisors (see below), whose sum is σ = 119542176. Its totient is φ = 10216800.

The previous prime is 42145277. The next prime is 42145291. The reversal of 42145290 is 9254124.

It is not an unprimeable number, because it can be changed into a prime (42145291) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20296 + ... + 22275.

It is an arithmetic number, because the mean of its divisors is an integer number (2490462).

Almost surely, 2^42145290 is an apocalyptic number.

42145290 is an abundant number, since it is smaller than the sum of its proper divisors (77396886).

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

42145290 is a wasteful number, since it uses less digits than its factorization.

42145290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42595 (or 42592 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 42145290 is about 6491.9403878964. The cubic root of 42145290 is about 348.0030221696.

The spelling of 42145290 in words is "forty-two million, one hundred forty-five thousand, two hundred ninety".