40497257 has 4 divisors (see below), whose sum is σ = 40529280. Its totient is φ = 40465236.

The previous prime is 40497251. The next prime is 40497269. The reversal of 40497257 is 75279404.

40497257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40497257 - 2⁴ = 40497241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40497257.

It is not an unprimeable number, because it can be changed into a prime (40497251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14033 + ... + 16670.

It is an arithmetic number, because the mean of its divisors is an integer number (10132320).

Almost surely, 2^40497257 is an apocalyptic number.

It is an amenable number.

40497257 is a deficient number, since it is larger than the sum of its proper divisors (32023).

40497257 is a wasteful number, since it uses less digits than its factorization.

40497257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32022.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 40497257 is about 6363.7455165963. The cubic root of 40497257 is about 343.4065196251.

The spelling of 40497257 in words is "forty million, four hundred ninety-seven thousand, two hundred fifty-seven".