40145212 has 24 divisors (see below), whose sum is σ = 73890432. Its totient is φ = 19047600.

The previous prime is 40145207. The next prime is 40145213. The reversal of 40145212 is 21254104.

It is a super-2 number, since 2×40145212² = 3223276093049888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40145212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40145213) 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, 10387 + ... + 13717.

It is an arithmetic number, because the mean of its divisors is an integer number (3078768).

Almost surely, 2^40145212 is an apocalyptic number.

It is an amenable number.

40145212 is a deficient number, since it is larger than the sum of its proper divisors (33745220).

40145212 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 12 representation: 40145212 = (11540224)₁₂.

40145212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3489 (or 3487 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 40145212 is about 6336.0249368196. The cubic root of 40145212 is about 342.4085379236.

Adding to 40145212 its reverse (21254104), we get a palindrome (61399316).

The spelling of 40145212 in words is "forty million, one hundred forty-five thousand, two hundred twelve".