42121232 has 40 divisors (see below), whose sum is σ = 83952960. Its totient is φ = 20465280.

The previous prime is 42121231. The next prime is 42121243. The reversal of 42121232 is 23212124.

It is a self number, because there is not a number n which added to its sum of digits gives 42121232.

It is not an unprimeable number, because it can be changed into a prime (42121231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100319 + ... + 100737.

It is an arithmetic number, because the mean of its divisors is an integer number (2098824).

Almost surely, 2^42121232 is an apocalyptic number.

It is an amenable number.

42121232 is a deficient number, since it is larger than the sum of its proper divisors (41831728).

42121232 is a wasteful number, since it uses less digits than its factorization.

42121232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591 (or 585 counting only the distinct ones).

The product of its digits is 192, while the sum is 17.

The square root of 42121232 is about 6490.0872105080. The cubic root of 42121232 is about 347.9367921490.

Adding to 42121232 its reverse (23212124), we get a palindrome (65333356).

The spelling of 42121232 in words is "forty-two million, one hundred twenty-one thousand, two hundred thirty-two".