42021652 has 6 divisors (see below), whose sum is σ = 73537898. Its totient is φ = 21010824.

The previous prime is 42021641. The next prime is 42021689. The reversal of 42021652 is 25612024.

It can be written as a sum of positive squares in only one way, i.e., 34644996 + 7376656 = 5886^2 + 2716^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5252703 + ... + 5252710.

Almost surely, 2^42021652 is an apocalyptic number.

It is an amenable number.

42021652 is a deficient number, since it is larger than the sum of its proper divisors (31516246).

42021652 is a wasteful number, since it uses less digits than its factorization.

42021652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10505417 (or 10505415 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 42021652 is about 6482.4109712359. The cubic root of 42021652 is about 347.6623867103.

Adding to 42021652 its reverse (25612024), we get a palindrome (67633676).

The spelling of 42021652 in words is "forty-two million, twenty-one thousand, six hundred fifty-two".