40520001 has 4 divisors (see below), whose sum is σ = 54026672. Its totient is φ = 27013332.

The previous prime is 40519991. The next prime is 40520017. The reversal of 40520001 is 10002504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-40520001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40520071) 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, 6753331 + ... + 6753336.

It is an arithmetic number, because the mean of its divisors is an integer number (13506668).

Almost surely, 2^40520001 is an apocalyptic number.

It is an amenable number.

40520001 is a deficient number, since it is larger than the sum of its proper divisors (13506671).

40520001 is a wasteful number, since it uses less digits than its factorization.

40520001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13506670.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 40520001 is about 6365.5322636838. The cubic root of 40520001 is about 343.4707953873.

Adding to 40520001 its reverse (10002504), we get a palindrome (50522505).

The spelling of 40520001 in words is "forty million, five hundred twenty thousand, one".