42743157 has 4 divisors (see below), whose sum is σ = 56990880. Its totient is φ = 28495436.

The previous prime is 42743153. The next prime is 42743167. The reversal of 42743157 is 75134724.

42743157 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, 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 42743157 - 2² = 42743153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42743153) 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, 7123857 + ... + 7123862.

It is an arithmetic number, because the mean of its divisors is an integer number (14247720).

Almost surely, 2^42743157 is an apocalyptic number.

It is an amenable number.

42743157 is a deficient number, since it is larger than the sum of its proper divisors (14247723).

42743157 is a wasteful number, since it uses less digits than its factorization.

42743157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14247722.

The product of its digits is 23520, while the sum is 33.

The square root of 42743157 is about 6537.8250970793. The cubic root of 42743157 is about 349.6408751759.

The spelling of 42743157 in words is "forty-two million, seven hundred forty-three thousand, one hundred fifty-seven".