42742132 has 6 divisors (see below), whose sum is σ = 74798738. Its totient is φ = 21371064.

The previous prime is 42742127. The next prime is 42742169. The reversal of 42742132 is 23124724.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 40908816 + 1833316 = 6396^2 + 1354^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42742097 and 42742106.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5342763 + ... + 5342770.

Almost surely, 2^42742132 is an apocalyptic number.

It is an amenable number.

42742132 is a deficient number, since it is larger than the sum of its proper divisors (32056606).

42742132 is a wasteful number, since it uses less digits than its factorization.

42742132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10685537 (or 10685535 counting only the distinct ones).

The product of its digits is 2688, while the sum is 25.

The square root of 42742132 is about 6537.7467066261. The cubic root of 42742132 is about 349.6380803054.

Adding to 42742132 its reverse (23124724), we get a palindrome (65866856).

The spelling of 42742132 in words is "forty-two million, seven hundred forty-two thousand, one hundred thirty-two".