42353257 has 4 divisors (see below), whose sum is σ = 42514560. Its totient is φ = 42191956.

The previous prime is 42353249. The next prime is 42353303. The reversal of 42353257 is 75235324.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42353257 - 2³ = 42353249 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42353057) 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, 80257 + ... + 80782.

It is an arithmetic number, because the mean of its divisors is an integer number (10628640).

Almost surely, 2^42353257 is an apocalyptic number.

It is an amenable number.

42353257 is a deficient number, since it is larger than the sum of its proper divisors (161303).

42353257 is a wasteful number, since it uses less digits than its factorization.

42353257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161302.

The product of its digits is 25200, while the sum is 31.

The square root of 42353257 is about 6507.9379990900. The cubic root of 42353257 is about 348.5744931249.

The spelling of 42353257 in words is "forty-two million, three hundred fifty-three thousand, two hundred fifty-seven".