40512401 has 4 divisors (see below), whose sum is σ = 40562100. Its totient is φ = 40462704.

The previous prime is 40512397. The next prime is 40512419. The reversal of 40512401 is 10421504.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16000000 + 24512401 = 4000^2 + 4951^2 .

It is a cyclic number.

It is not a de Polignac number, because 40512401 - 2² = 40512397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40512401.

It is not an unprimeable number, because it can be changed into a prime (40512491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23606 + ... + 25263.

It is an arithmetic number, because the mean of its divisors is an integer number (10140525).

Almost surely, 2^40512401 is an apocalyptic number.

It is an amenable number.

40512401 is a deficient number, since it is larger than the sum of its proper divisors (49699).

40512401 is an equidigital number, since it uses as much as digits as its factorization.

40512401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49698.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 40512401 is about 6364.9352706842. The cubic root of 40512401 is about 343.4493200566.

Adding to 40512401 its reverse (10421504), we get a palindrome (50933905).

The spelling of 40512401 in words is "forty million, five hundred twelve thousand, four hundred one".