42907157 has 4 divisors (see below), whose sum is σ = 43716780. Its totient is φ = 42097536.

The previous prime is 42907141. The next prime is 42907171. The reversal of 42907157 is 75170924.

42907157 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 35117476 + 7789681 = 5926^2 + 2791^2 .

It is a cyclic number.

It is not a de Polignac number, because 42907157 - 2⁴ = 42907141 is a prime.

It is a super-3 number, since 3×42907157³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42907357) 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, 404732 + ... + 404837.

It is an arithmetic number, because the mean of its divisors is an integer number (10929195).

Almost surely, 2^42907157 is an apocalyptic number.

It is an amenable number.

42907157 is a deficient number, since it is larger than the sum of its proper divisors (809623).

42907157 is an equidigital number, since it uses as much as digits as its factorization.

42907157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809622.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 42907157 is about 6550.3554865366. The cubic root of 42907157 is about 350.0874801739.

The spelling of 42907157 in words is "forty-two million, nine hundred seven thousand, one hundred fifty-seven".