40471257 has 4 divisors (see below), whose sum is σ = 53961680. Its totient is φ = 26980836.

The previous prime is 40471253. The next prime is 40471261. The reversal of 40471257 is 75217404.

40471257 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 an interprime number because it is at equal distance from previous prime (40471253) and next prime (40471261).

It is not a de Polignac number, because 40471257 - 2² = 40471253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40471253) 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, 6745207 + ... + 6745212.

It is an arithmetic number, because the mean of its divisors is an integer number (13490420).

Almost surely, 2^40471257 is an apocalyptic number.

It is an amenable number.

40471257 is a deficient number, since it is larger than the sum of its proper divisors (13490423).

40471257 is a wasteful number, since it uses less digits than its factorization.

40471257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13490422.

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 40471257 is about 6361.7023665054. The cubic root of 40471257 is about 343.3330127457. Note that the first 3 decimals are identical.

The spelling of 40471257 in words is "forty million, four hundred seventy-one thousand, two hundred fifty-seven".