42157312 has 18 divisors (see below), whose sum is σ = 84150458. Its totient is φ = 21078528.

The previous prime is 42157301. The next prime is 42157327. The reversal of 42157312 is 21375124.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 40755456 + 1401856 = 6384^2 + 1184^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82083 + ... + 82594.

Almost surely, 2^42157312 is an apocalyptic number.

It is an amenable number.

42157312 is a deficient number, since it is larger than the sum of its proper divisors (41993146).

42157312 is an equidigital number, since it uses as much as digits as its factorization.

42157312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164693 (or 164679 counting only the distinct ones).

The product of its digits is 1680, while the sum is 25.

The square root of 42157312 is about 6492.8662391890. The cubic root of 42157312 is about 348.0361084654.

The spelling of 42157312 in words is "forty-two million, one hundred fifty-seven thousand, three hundred twelve".