40001212 has 6 divisors (see below), whose sum is σ = 70002128. Its totient is φ = 20000604.

The previous prime is 40001197. The next prime is 40001231. The reversal of 40001212 is 21210004.

It is a super-2 number, since 2×40001212² = 3200193922937888, which contains 22 as substring.

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, 5000148 + ... + 5000155.

Almost surely, 2^40001212 is an apocalyptic number.

It is an amenable number.

40001212 is a deficient number, since it is larger than the sum of its proper divisors (30000916).

40001212 is a wasteful number, since it uses less digits than its factorization.

40001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10000307 (or 10000305 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 40001212 is about 6324.6511366241. The cubic root of 40001212 is about 341.9986434519.

Adding to 40001212 its reverse (21210004), we get a palindrome (61211216).

The spelling of 40001212 in words is "forty million, one thousand, two hundred twelve".