42123472 has 10 divisors (see below), whose sum is σ = 81614258. Its totient is φ = 21061728.

The previous prime is 42123469. The next prime is 42123479. The reversal of 42123472 is 27432124.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 37896336 + 4227136 = 6156^2 + 2056^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42123479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1316343 + ... + 1316374.

Almost surely, 2^42123472 is an apocalyptic number.

It is an amenable number.

42123472 is a deficient number, since it is larger than the sum of its proper divisors (39490786).

42123472 is a wasteful number, since it uses less digits than its factorization.

42123472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2632725 (or 2632719 counting only the distinct ones).

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

The square root of 42123472 is about 6490.2597790843. The cubic root of 42123472 is about 347.9429597796.

Adding to 42123472 its reverse (27432124), we get a palindrome (69555596).

The spelling of 42123472 in words is "forty-two million, one hundred twenty-three thousand, four hundred seventy-two".