40021252 has 24 divisors (see below), whose sum is σ = 71963136. Its totient is φ = 19465728.

The previous prime is 40021249. The next prime is 40021259. The reversal of 40021252 is 25212004.

It is a super-2 number, since 2×40021252² = 3203401223295008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40021259) 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, 35733 + ... + 36835.

It is an arithmetic number, because the mean of its divisors is an integer number (2998464).

Almost surely, 2^40021252 is an apocalyptic number.

It is an amenable number.

40021252 is a deficient number, since it is larger than the sum of its proper divisors (31941884).

40021252 is a wasteful number, since it uses less digits than its factorization.

40021252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347 (or 1345 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 40021252 is about 6326.2352153552. The cubic root of 40021252 is about 342.0557459601.

Adding to 40021252 its reverse (25212004), we get a palindrome (65233256).

The spelling of 40021252 in words is "forty million, twenty-one thousand, two hundred fifty-two".