42391560 has 32 divisors (see below), whose sum is σ = 127175040. Its totient is φ = 11304384.

The previous prime is 42391537. The next prime is 42391561. The reversal of 42391560 is 6519324.

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

It is not an unprimeable number, because it can be changed into a prime (42391561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176512 + ... + 176751.

It is an arithmetic number, because the mean of its divisors is an integer number (3974220).

Almost surely, 2^42391560 is an apocalyptic number.

42391560 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42391560 is an abundant number, since it is smaller than the sum of its proper divisors (84783480).

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

42391560 is a wasteful number, since it uses less digits than its factorization.

42391560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353277 (or 353273 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 42391560 is about 6510.8801248372. The cubic root of 42391560 is about 348.6795415272.

The spelling of 42391560 in words is "forty-two million, three hundred ninety-one thousand, five hundred sixty".