40012481 has 2 divisors, whose sum is σ = 40012482. Its totient is φ = 40012480.

The previous prime is 40012477. The next prime is 40012517. The reversal of 40012481 is 18421004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28729600 + 11282881 = 5360^2 + 3359^2 .

It is a cyclic number.

It is not a de Polignac number, because 40012481 - 2² = 40012477 is a prime.

It is a super-2 number, since 2×40012481² = 3201997271550722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (40012411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20006240 + 20006241.

It is an arithmetic number, because the mean of its divisors is an integer number (20006241).

Almost surely, 2^40012481 is an apocalyptic number.

It is an amenable number.

40012481 is a deficient number, since it is larger than the sum of its proper divisors (1).

40012481 is an equidigital number, since it uses as much as digits as its factorization.

40012481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 40012481 is about 6325.5419530662. The cubic root of 40012481 is about 342.0307559860.

Adding to 40012481 its reverse (18421004), we get a palindrome (58433485).

The spelling of 40012481 in words is "forty million, twelve thousand, four hundred eighty-one".