40591457 has 2 divisors, whose sum is σ = 40591458. Its totient is φ = 40591456.

The previous prime is 40591451. The next prime is 40591471. The reversal of 40591457 is 75419504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40398736 + 192721 = 6356^2 + 439^2 .

It is a cyclic number.

It is not a de Polignac number, because 40591457 - 2¹² = 40587361 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40591451) 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 as a sum of consecutive naturals, namely, 20295728 + 20295729.

It is an arithmetic number, because the mean of its divisors is an integer number (20295729).

Almost surely, 2^40591457 is an apocalyptic number.

It is an amenable number.

40591457 is a deficient number, since it is larger than the sum of its proper divisors (1).

40591457 is an equidigital number, since it uses as much as digits as its factorization.

40591457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 40591457 is about 6371.1425192033. The cubic root of 40591457 is about 343.6725775167.

The spelling of 40591457 in words is "forty million, five hundred ninety-one thousand, four hundred fifty-seven".