40641345 has 40 divisors (see below), whose sum is σ = 76038336. Its totient is φ = 20728224.

The previous prime is 40641331. The next prime is 40641353. The reversal of 40641345 is 54314604.

It is not a de Polignac number, because 40641345 - 2¹⁵ = 40608577 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7134 + ... + 11496.

Almost surely, 2^40641345 is an apocalyptic number.

40641345 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40641345 is a deficient number, since it is larger than the sum of its proper divisors (35396991).

40641345 is a wasteful number, since it uses less digits than its factorization.

40641345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4403 (or 4394 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 40641345 is about 6375.0564703381. The cubic root of 40641345 is about 343.8133141779.

Adding to 40641345 its reverse (54314604), we get a palindrome (94955949).

The spelling of 40641345 in words is "forty million, six hundred forty-one thousand, three hundred forty-five".