42122390 has 8 divisors (see below), whose sum is σ = 75820320. Its totient is φ = 16848952.

The previous prime is 42122371. The next prime is 42122393. The reversal of 42122390 is 9322124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42122393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2106110 + ... + 2106129.

It is an arithmetic number, because the mean of its divisors is an integer number (9477540).

Almost surely, 2^42122390 is an apocalyptic number.

42122390 is a deficient number, since it is larger than the sum of its proper divisors (33697930).

42122390 is a wasteful number, since it uses less digits than its factorization.

42122390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4212246.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 42122390 is about 6490.1764228717. The cubic root of 42122390 is about 347.9399806210.

The spelling of 42122390 in words is "forty-two million, one hundred twenty-two thousand, three hundred ninety".