40191075 has 18 divisors (see below), whose sum is σ = 71987084. Its totient is φ = 21435120.

The previous prime is 40191059. The next prime is 40191079. The reversal of 40191075 is 57019104.

It is not a de Polignac number, because 40191075 - 2⁴ = 40191059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40191079) 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 17 ways as a sum of consecutive naturals, for example, 89089 + ... + 89538.

Almost surely, 2^40191075 is an apocalyptic number.

40191075 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40191075 is a deficient number, since it is larger than the sum of its proper divisors (31796009).

40191075 is a wasteful number, since it uses less digits than its factorization.

40191075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178643 (or 178635 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 40191075 is about 6339.6431287573. The cubic root of 40191075 is about 342.5388806270.

The spelling of 40191075 in words is "forty million, one hundred ninety-one thousand, seventy-five".