42697157 has 4 divisors (see below), whose sum is σ = 43334496. Its totient is φ = 42059820.

The previous prime is 42697121. The next prime is 42697159. The reversal of 42697157 is 75179624.

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 42697157 - 2⁶ = 42697093 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 (42697159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318569 + ... + 318702.

It is an arithmetic number, because the mean of its divisors is an integer number (10833624).

Almost surely, 2^42697157 is an apocalyptic number.

It is an amenable number.

42697157 is a deficient number, since it is larger than the sum of its proper divisors (637339).

42697157 is an equidigital number, since it uses as much as digits as its factorization.

42697157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637338.

The product of its digits is 105840, while the sum is 41.

The square root of 42697157 is about 6534.3061605652. The cubic root of 42697157 is about 349.5154028236.

The spelling of 42697157 in words is "forty-two million, six hundred ninety-seven thousand, one hundred fifty-seven".