43601261 has 12 divisors (see below), whose sum is σ = 50012256. Its totient is φ = 37911720.

The previous prime is 43601237. The next prime is 43601263. The reversal of 43601261 is 16210634.

It is a happy number.

It is not a de Polignac number, because 43601261 - 2⁶ = 43601197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43601263) 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, 5051 + ... + 10616.

It is an arithmetic number, because the mean of its divisors is an integer number (4167688).

Almost surely, 2^43601261 is an apocalyptic number.

It is an amenable number.

43601261 is a deficient number, since it is larger than the sum of its proper divisors (6410995).

43601261 is a wasteful number, since it uses less digits than its factorization.

43601261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15712 (or 15701 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 43601261 is about 6603.1250934690. The cubic root of 43601261 is about 351.9651658237.

Adding to 43601261 its reverse (16210634), we get a palindrome (59811895).

The spelling of 43601261 in words is "forty-three million, six hundred one thousand, two hundred sixty-one".