42390237 has 8 divisors (see below), whose sum is σ = 58343680. Its totient is φ = 27348480.

The previous prime is 42390223. The next prime is 42390239. The reversal of 42390237 is 73209324.

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

It is not a de Polignac number, because 42390237 - 2⁷ = 42390109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42390239) 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, 227812 + ... + 227997.

It is an arithmetic number, because the mean of its divisors is an integer number (7292960).

Almost surely, 2^42390237 is an apocalyptic number.

It is an amenable number.

42390237 is a deficient number, since it is larger than the sum of its proper divisors (15953443).

42390237 is a wasteful number, since it uses less digits than its factorization.

42390237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455843.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 42390237 is about 6510.7785248770. The cubic root of 42390237 is about 348.6759141713.

The spelling of 42390237 in words is "forty-two million, three hundred ninety thousand, two hundred thirty-seven".