4042290 has 32 divisors (see below), whose sum is σ = 11088000. Its totient is φ = 923904.

The previous prime is 4042271. The next prime is 4042303. The reversal of 4042290 is 922404.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9415 + ... + 9834.

It is an arithmetic number, because the mean of its divisors is an integer number (346500).

Almost surely, 2^4042290 is an apocalyptic number.

4042290 is an abundant number, since it is smaller than the sum of its proper divisors (7045710).

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

4042290 is a wasteful number, since it uses less digits than its factorization.

4042290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19266.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 4042290 is about 2010.5447023133. The cubic root of 4042290 is about 159.2975717706.

Adding to 4042290 its reverse (922404), we get a palindrome (4964694).

The spelling of 4042290 in words is "four million, forty-two thousand, two hundred ninety".