52121642 has 16 divisors (see below), whose sum is σ = 81280800. Its totient is φ = 25037040.

The previous prime is 52121639. The next prime is 52121647. The reversal of 52121642 is 24612125.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (52121647) 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 7 ways as a sum of consecutive naturals, for example, 10109 + ... + 14367.

It is an arithmetic number, because the mean of its divisors is an integer number (5080050).

Almost surely, 2^52121642 is an apocalyptic number.

52121642 is a deficient number, since it is larger than the sum of its proper divisors (29159158).

52121642 is a wasteful number, since it uses less digits than its factorization.

52121642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4501.

The product of its digits is 960, while the sum is 23.

The square root of 52121642 is about 7219.5319792906. The cubic root of 52121642 is about 373.5419339821.

Adding to 52121642 its reverse (24612125), we get a palindrome (76733767).

The spelling of 52121642 in words is "fifty-two million, one hundred twenty-one thousand, six hundred forty-two".