43402145 has 8 divisors (see below), whose sum is σ = 52250856. Its totient is φ = 34609536.

The previous prime is 43402133. The next prime is 43402157. The reversal of 43402145 is 54120434.

It is an interprime number because it is at equal distance from previous prime (43402133) and next prime (43402157).

It can be written as a sum of positive squares in 4 ways, for example, as 1515361 + 41886784 = 1231^2 + 6472^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43402145 - 2¹⁶ = 43336609 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 43402145.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12302 + ... + 15431.

It is an arithmetic number, because the mean of its divisors is an integer number (6531357).

Almost surely, 2^43402145 is an apocalyptic number.

It is an amenable number.

43402145 is a deficient number, since it is larger than the sum of its proper divisors (8848711).

43402145 is a wasteful number, since it uses less digits than its factorization.

43402145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28051.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 43402145 is about 6588.0304340524. The cubic root of 43402145 is about 351.4285693433.

Adding to 43402145 its reverse (54120434), we get a palindrome (97522579).

The spelling of 43402145 in words is "forty-three million, four hundred two thousand, one hundred forty-five".