40145252 has 48 divisors (see below), whose sum is σ = 86016000. Its totient is φ = 16010784.

The previous prime is 40145249. The next prime is 40145299. The reversal of 40145252 is 25254104.

It is a happy number.

It is a super-3 number, since 3×40145252³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30749 + ... + 32027.

It is an arithmetic number, because the mean of its divisors is an integer number (1792000).

Almost surely, 2^40145252 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40145252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43008000).

40145252 is an abundant number, since it is smaller than the sum of its proper divisors (45870748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40145252 is a wasteful number, since it uses less digits than its factorization.

40145252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368 (or 1366 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 40145252 is about 6336.0280933721. The cubic root of 40145252 is about 342.4086516469.

Adding to 40145252 its reverse (25254104), we get a palindrome (65399356).

The spelling of 40145252 in words is "forty million, one hundred forty-five thousand, two hundred fifty-two".