40147505 has 4 divisors (see below), whose sum is σ = 48177012. Its totient is φ = 32118000.

The previous prime is 40147501. The next prime is 40147507. The reversal of 40147505 is 50574104.

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 19280881 + 20866624 = 4391^2 + 4568^2 .

It is not a de Polignac number, because 40147505 - 2² = 40147501 is a prime.

It is a super-2 number, since 2×40147505² = 3223644315450050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40147501) 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 3 ways as a sum of consecutive naturals, for example, 4014746 + ... + 4014755.

It is an arithmetic number, because the mean of its divisors is an integer number (12044253).

Almost surely, 2^40147505 is an apocalyptic number.

It is an amenable number.

40147505 is a deficient number, since it is larger than the sum of its proper divisors (8029507).

40147505 is an equidigital number, since it uses as much as digits as its factorization.

40147505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8029506.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 40147505 is about 6336.2058836499. The cubic root of 40147505 is about 342.4150569894.

The spelling of 40147505 in words is "forty million, one hundred forty-seven thousand, five hundred five".