40254191 has 2 divisors, whose sum is σ = 40254192. Its totient is φ = 40254190.

The previous prime is 40254173. The next prime is 40254199. The reversal of 40254191 is 19145204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40254191 - 2¹⁰ = 40253167 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40254191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40254199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20127095 + 20127096.

It is an arithmetic number, because the mean of its divisors is an integer number (20127096).

Almost surely, 2^40254191 is an apocalyptic number.

40254191 is a deficient number, since it is larger than the sum of its proper divisors (1).

40254191 is an equidigital number, since it uses as much as digits as its factorization.

40254191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 40254191 is about 6344.6190586985. The cubic root of 40254191 is about 342.7180943512.

Adding to 40254191 its reverse (19145204), we get a palindrome (59399395).

The spelling of 40254191 in words is "forty million, two hundred fifty-four thousand, one hundred ninety-one".