1043440225 has 24 divisors (see below), whose sum is σ = 1306523520. Its totient is φ = 826632000.

The previous prime is 1043440199. The next prime is 1043440249. The reversal of 1043440225 is 5220443401.

It is a happy number.

It is not a de Polignac number, because 1043440225 - 2²³ = 1035051617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 1043440225.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1928455 + ... + 1928995.

It is an arithmetic number, because the mean of its divisors is an integer number (54438480).

Almost surely, 2^1043440225 is an apocalyptic number.

It is an amenable number.

1043440225 is a deficient number, since it is larger than the sum of its proper divisors (263083295).

1043440225 is a wasteful number, since it uses less digits than its factorization.

1043440225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161 (or 1156 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1043440225 is about 32302.3253806905. The cubic root of 1043440225 is about 1014.2753205262.

Adding to 1043440225 its reverse (5220443401), we get a palindrome (6263883626).

The spelling of 1043440225 in words is "one billion, forty-three million, four hundred forty thousand, two hundred twenty-five".