40645061 has 4 divisors (see below), whose sum is σ = 41956224. Its totient is φ = 39333900.

The previous prime is 40645027. The next prime is 40645067. The reversal of 40645061 is 16054604.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40645061 - 2⁶ = 40644997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40645061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40645067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 655535 + ... + 655596.

It is an arithmetic number, because the mean of its divisors is an integer number (10489056).

Almost surely, 2^40645061 is an apocalyptic number.

It is an amenable number.

40645061 is a deficient number, since it is larger than the sum of its proper divisors (1311163).

40645061 is a wasteful number, since it uses less digits than its factorization.

40645061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311162.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 40645061 is about 6375.3479120751. The cubic root of 40645061 is about 343.8237925986.

Adding to 40645061 its reverse (16054604), we get a palindrome (56699665).

The spelling of 40645061 in words is "forty million, six hundred forty-five thousand, sixty-one".