40457249 has 4 divisors (see below), whose sum is σ = 46236864. Its totient is φ = 34677636.

The previous prime is 40457231. The next prime is 40457269. The reversal of 40457249 is 94275404.

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 not a de Polignac number, because 40457249 - 2¹⁶ = 40391713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40457269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2889797 + ... + 2889810.

It is an arithmetic number, because the mean of its divisors is an integer number (11559216).

Almost surely, 2^40457249 is an apocalyptic number.

It is an amenable number.

40457249 is a deficient number, since it is larger than the sum of its proper divisors (5779615).

40457249 is an equidigital number, since it uses as much as digits as its factorization.

40457249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5779614.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 40457249 is about 6360.6013080526. The cubic root of 40457249 is about 343.2933964502.

The spelling of 40457249 in words is "forty million, four hundred fifty-seven thousand, two hundred forty-nine".