42790 has 16 divisors (see below), whose sum is σ = 84240. Its totient is φ = 15520.

The previous prime is 42787. The next prime is 42793. The reversal of 42790 is 9724.

42790 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (42787) and next prime (42793).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42793) 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, 85 + ... + 304.

It is an arithmetic number, because the mean of its divisors is an integer number (5265).

2⁴²⁷⁹⁰ is an apocalyptic number.

42790 is a deficient number, since it is larger than the sum of its proper divisors (41450).

42790 is a wasteful number, since it uses less digits than its factorization.

42790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 42790 is about 206.8574388317. The cubic root of 42790 is about 34.9768554468.

The spelling of 42790 in words is "forty-two thousand, seven hundred ninety".