40245771 has 12 divisors (see below), whose sum is σ = 54836072. Its totient is φ = 26255328.

The previous prime is 40245769. The next prime is 40245827. The reversal of 40245771 is 17754204.

It is not a de Polignac number, because 40245771 - 2¹ = 40245769 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40245701) 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 11 ways as a sum of consecutive naturals, for example, 3591 + ... + 9663.

Almost surely, 2^40245771 is an apocalyptic number.

40245771 is a deficient number, since it is larger than the sum of its proper divisors (14590301).

40245771 is an equidigital number, since it uses as much as digits as its factorization.

40245771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6170 (or 6123 counting only the distinct ones).

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

The square root of 40245771 is about 6343.9554695789. The cubic root of 40245771 is about 342.6941971493.

Adding to 40245771 its reverse (17754204), we get a palindrome (57999975).

The spelling of 40245771 in words is "forty million, two hundred forty-five thousand, seven hundred seventy-one".