42389523 has 12 divisors (see below), whose sum is σ = 66795768. Its totient is φ = 25690560.

The previous prime is 42389519. The next prime is 42389533. The reversal of 42389523 is 32598324.

It is not a de Polignac number, because 42389523 - 2² = 42389519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42389533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213990 + ... + 214187.

It is an arithmetic number, because the mean of its divisors is an integer number (5566314).

Almost surely, 2^42389523 is an apocalyptic number.

42389523 is a deficient number, since it is larger than the sum of its proper divisors (24406245).

42389523 is a wasteful number, since it uses less digits than its factorization.

42389523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428194 (or 428191 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 42389523 is about 6510.7236924938. The cubic root of 42389523 is about 348.6739565193.

The spelling of 42389523 in words is "forty-two million, three hundred eighty-nine thousand, five hundred twenty-three".