42454157 has 4 divisors (see below), whose sum is σ = 42931260. Its totient is φ = 41977056.

The previous prime is 42454129. The next prime is 42454169. The reversal of 42454157 is 75145424.

42454157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5900041 + 36554116 = 2429^2 + 6046^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42454157 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 (42454177) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 238418 + ... + 238595.

It is an arithmetic number, because the mean of its divisors is an integer number (10732815).

Almost surely, 2^42454157 is an apocalyptic number.

It is an amenable number.

42454157 is a deficient number, since it is larger than the sum of its proper divisors (477103).

42454157 is an equidigital number, since it uses as much as digits as its factorization.

42454157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477102.

The product of its digits is 22400, while the sum is 32.

The square root of 42454157 is about 6515.6854589521. The cubic root of 42454157 is about 348.8510816395.

The spelling of 42454157 in words is "forty-two million, four hundred fifty-four thousand, one hundred fifty-seven".