40045457 has 4 divisors (see below), whose sum is σ = 40897536. Its totient is φ = 39193380.

The previous prime is 40045441. The next prime is 40045487. The reversal of 40045457 is 75454004.

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 40045457 - 2⁴ = 40045441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40045487) 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 in 3 ways as a sum of consecutive naturals, for example, 425969 + ... + 426062.

It is an arithmetic number, because the mean of its divisors is an integer number (10224384).

Almost surely, 2^40045457 is an apocalyptic number.

40045457 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

40045457 is a deficient number, since it is larger than the sum of its proper divisors (852079).

40045457 is an equidigital number, since it uses as much as digits as its factorization.

40045457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852078.

The product of its (nonzero) digits is 11200, while the sum is 29.

The square root of 40045457 is about 6328.1479913163. The cubic root of 40045457 is about 342.1246909191.

The spelling of 40045457 in words is "forty million, forty-five thousand, four hundred fifty-seven".