40545451 has 12 divisors (see below), whose sum is σ = 43159792. Its totient is φ = 38060064.

The previous prime is 40545437. The next prime is 40545457. The reversal of 40545451 is 15454504.

It is not a de Polignac number, because 40545451 - 2⁹ = 40544939 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40545457) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30466 + ... + 31768.

Almost surely, 2^40545451 is an apocalyptic number.

40545451 is a deficient number, since it is larger than the sum of its proper divisors (2614341).

40545451 is a wasteful number, since it uses less digits than its factorization.

40545451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398 (or 1369 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 40545451 is about 6367.5309971762. The cubic root of 40545451 is about 343.5426899419.

Adding to 40545451 its reverse (15454504), we get a palindrome (55999955).

The spelling of 40545451 in words is "forty million, five hundred forty-five thousand, four hundred fifty-one".