40517261 has 4 divisors (see below), whose sum is σ = 40918524. Its totient is φ = 40116000.

The previous prime is 40517251. The next prime is 40517287. The reversal of 40517261 is 16271504.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25694761 + 14822500 = 5069^2 + 3850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40517261 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40517261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40517221) 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, 200480 + ... + 200681.

It is an arithmetic number, because the mean of its divisors is an integer number (10229631).

Almost surely, 2^40517261 is an apocalyptic number.

It is an amenable number.

40517261 is a deficient number, since it is larger than the sum of its proper divisors (401263).

40517261 is a wasteful number, since it uses less digits than its factorization.

40517261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401262.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 40517261 is about 6365.3170384514. The cubic root of 40517261 is about 343.4630532750.

Adding to 40517261 its reverse (16271504), we get a palindrome (56788765).

The spelling of 40517261 in words is "forty million, five hundred seventeen thousand, two hundred sixty-one".