40146145 has 16 divisors (see below), whose sum is σ = 54613440. Its totient is φ = 28085184.

The previous prime is 40146143. The next prime is 40146149. The reversal of 40146145 is 54164104.

It is a cyclic number.

It is not a de Polignac number, because 40146145 - 2¹ = 40146143 is a prime.

It is a super-2 number, since 2×40146145² = 3223425916722050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40146143) 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 15 ways as a sum of consecutive naturals, for example, 15019 + ... + 17488.

It is an arithmetic number, because the mean of its divisors is an integer number (3413340).

Almost surely, 2^40146145 is an apocalyptic number.

It is an amenable number.

40146145 is a deficient number, since it is larger than the sum of its proper divisors (14467295).

40146145 is a wasteful number, since it uses less digits than its factorization.

40146145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32544.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 40146145 is about 6336.0985629960. The cubic root of 40146145 is about 342.4111904997.

The spelling of 40146145 in words is "forty million, one hundred forty-six thousand, one hundred forty-five".