40845451 has 2 divisors, whose sum is σ = 40845452. Its totient is φ = 40845450.

The previous prime is 40845443. The next prime is 40845487. The reversal of 40845451 is 15454804.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40845451 - 2³ = 40845443 is a prime.

It is not a weakly prime, because it can be changed into another prime (40845251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20422725 + 20422726.

It is an arithmetic number, because the mean of its divisors is an integer number (20422726).

Almost surely, 2^40845451 is an apocalyptic number.

40845451 is a deficient number, since it is larger than the sum of its proper divisors (1).

40845451 is an equidigital number, since it uses as much as digits as its factorization.

40845451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12800, while the sum is 31.

The square root of 40845451 is about 6391.0445938047. The cubic root of 40845451 is about 344.3879114025.

The spelling of 40845451 in words is "forty million, eight hundred forty-five thousand, four hundred fifty-one".