40126291 has 2 divisors, whose sum is σ = 40126292. Its totient is φ = 40126290.

The previous prime is 40126231. The next prime is 40126301. The reversal of 40126291 is 19262104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40126291 - 2⁹ = 40125779 is a prime.

It is a super-2 number, since 2×40126291² = 3220238458833362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40126201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20063145 + 20063146.

It is an arithmetic number, because the mean of its divisors is an integer number (20063146).

Almost surely, 2^40126291 is an apocalyptic number.

40126291 is a deficient number, since it is larger than the sum of its proper divisors (1).

40126291 is an equidigital number, since it uses as much as digits as its factorization.

40126291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 40126291 is about 6334.5316322519. The cubic root of 40126291 is about 342.3547354922.

Adding to 40126291 its reverse (19262104), we get a palindrome (59388395).

The spelling of 40126291 in words is "forty million, one hundred twenty-six thousand, two hundred ninety-one".