40145603 has 4 divisors (see below), whose sum is σ = 41891088. Its totient is φ = 38400120.

The previous prime is 40145591. The next prime is 40145639. The reversal of 40145603 is 30654104.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 40145603 - 2²⁰ = 39097027 is a prime.

It is a super-2 number, since 2×40145603² = 3223338880467218, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 1745461 = 40145603 / (4 + 0 + 1 + 4 + 5 + 6 + 0 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40142603) 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, 872708 + ... + 872753.

It is an arithmetic number, because the mean of its divisors is an integer number (10472772).

Almost surely, 2^40145603 is an apocalyptic number.

40145603 is a deficient number, since it is larger than the sum of its proper divisors (1745485).

40145603 is a wasteful number, since it uses less digits than its factorization.

40145603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1745484.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 40145603 is about 6336.0557920523. The cubic root of 40145603 is about 342.4096495656.

Adding to 40145603 its reverse (30654104), we get a palindrome (70799707).

The spelling of 40145603 in words is "forty million, one hundred forty-five thousand, six hundred three".