40245769 has 2 divisors, whose sum is σ = 40245770. Its totient is φ = 40245768.

The previous prime is 40245757. The next prime is 40245827. The reversal of 40245769 is 96754204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38900169 + 1345600 = 6237^2 + 1160^2 .

It is a cyclic number.

It is not a de Polignac number, because 40245769 - 2¹⁵ = 40213001 is a prime.

It is a super-2 number, since 2×40245769² = 3239443844802722, which contains 22 as substring.

It is equal to p_2447677 and since 40245769 and 2447677 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40245739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20122884 + 20122885.

It is an arithmetic number, because the mean of its divisors is an integer number (20122885).

Almost surely, 2^40245769 is an apocalyptic number.

It is an amenable number.

40245769 is a deficient number, since it is larger than the sum of its proper divisors (1).

40245769 is an equidigital number, since it uses as much as digits as its factorization.

40245769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 40245769 is about 6343.9553119485. The cubic root of 40245769 is about 342.6941914726.

It can be divided in two parts, 40245 and 769, that added together give a palindrome (41014).

The spelling of 40245769 in words is "forty million, two hundred forty-five thousand, seven hundred sixty-nine".