40785261 has 16 divisors (see below), whose sum is σ = 62814528. Its totient is φ = 23264000.

The previous prime is 40785221. The next prime is 40785263. The reversal of 40785261 is 16258704.

It is a cyclic number.

It is not a de Polignac number, because 40785261 - 2¹³ = 40777069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40785263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35790 + ... + 36911.

It is an arithmetic number, because the mean of its divisors is an integer number (3925908).

Almost surely, 2^40785261 is an apocalyptic number.

It is an amenable number.

40785261 is a deficient number, since it is larger than the sum of its proper divisors (22029267).

40785261 is a wasteful number, since it uses less digits than its factorization.

40785261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72732.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 40785261 is about 6386.3339248743. Note that the first 3 decimals coincide. The cubic root of 40785261 is about 344.2186644958.

It can be divided in two parts, 4078 and 5261, that added together give a palindrome (9339).

The spelling of 40785261 in words is "forty million, seven hundred eighty-five thousand, two hundred sixty-one".