43402261 has 4 divisors (see below), whose sum is σ = 49602592. Its totient is φ = 37201932.

The previous prime is 43402259. The next prime is 43402279. The reversal of 43402261 is 16220434.

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 43402261 - 2¹ = 43402259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43402211) 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, 3100155 + ... + 3100168.

It is an arithmetic number, because the mean of its divisors is an integer number (12400648).

Almost surely, 2^43402261 is an apocalyptic number.

It is an amenable number.

43402261 is a deficient number, since it is larger than the sum of its proper divisors (6200331).

43402261 is an equidigital number, since it uses as much as digits as its factorization.

43402261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6200330.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 43402261 is about 6588.0392378917. The cubic root of 43402261 is about 351.4288824283.

Adding to 43402261 its reverse (16220434), we get a palindrome (59622695).

The spelling of 43402261 in words is "forty-three million, four hundred two thousand, two hundred sixty-one".